Technical sheet

Lemfo C20 smartwatch

Name: Lemfo C20 smartwatch
Brand: Lemfo
SKU: 141518105
Rating: 4 (1 reviews)

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1 Reviews

4 Questions

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Long

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Features of Lemfo C20

Product description of Lemfo C20 smartwatch

Description summary

Conquer your next adventure with the LEMFO C20 rugged smartwatch. Built to withstand the elements with a shock-resistant design and 5 ATM water resistance, it´s perfect for any sport, on land or in water. Track your fitness with over 20 sports modes, monitor your heart rate and SpO2, and analyze your sleep. Stay connected with phone notifications, all powered by an incredible battery life of up to 20 days on a single charge

The LEMFO C20 is a rugged smartwatch ideal for adventure and/or water sports, as it features a rugged design and 5 ATM water resistance. Choose from over 20 sports modes and stay alert by linking it to your smartphone. All with a battery life of up to 20 days.

Features:

Submersible, robust and shock-resistant design:
- The LEMFO C20 watch features a robust design with a black finish , and is certified 5 ATM water resistant , allowing you to wear it without fear outside when it rains or while practicing your favorite water activities.

Check your fitness level at any time:
- The LEMFO C20 smartwatch offers different functions for controlling our physical condition, such as continuous monitoring of heart rate or measuring blood oxygen saturation (SpO2) at specific times.

- LEMFO C20 also records your hours of rest , detecting and comprehensively analyzing the phases of sleep and its duration.

Activity log with over 20 modes:
- The LEMFO C20 watch also helps you achieve your fitness goals intelligently. You´ll know exactly where you stand by tracking your heart rate , calorie burn , and other essential information while you exercise.

- With over 20 sports modes included, this LEMFO watch is sure to meet your needs: walking, running, cycling, skipping, badminton, basketball, football, swimming, tennis, rugby, golf, yoga, gymnastics, dance, baseball, elliptical, rowing, trail running, skiing, bowling, weight training, sit-ups, free training and climbing.

Alerts, notifications and other phone-related features:
- Pairing the LEMFO C20 with your phone via Bluetooth will allow you to receive alerts of incoming calls, messages or notifications on your phone.
- You can also sync your fitness and wellness data with the DaFit app to see detailed graphs showing your fitness progress.

Specifictions:

Design:
- Strap: Silicone
- Waterproof rating: 5 ATM
- Dimensions: 54 x 44 x 14 mm
- Weight: 56.2 g

Screen:
- Size: 1.71” (rectangular)
- Type: TFT IPS
- Resolution: 280 x 320 p
- Touch: Yes

Technical parameters:
- Chipset: RealTek8762D
- Connectivity: Bluetooth 5.0
- System requirements: Android 6.0 or higher, iOS 9.0 or higher
- Application: DaFit

Sensors:
- Heart Rate HRS3690
- Accelerometer

Battery:
- Capacity: 380 mAh
- Battery life (typical daily use): 15-20 days
- Charging method: Magnetic

Package Contents:
- 1 x LEMFO C20 Black
- 1 x Charging Cable
- 1 x User Manual

Specifications

Manual

Technical specifications of Lemfo C20

Dimensions

48.7 X 40.2 X 12.9 Mm
Weight

50 G
Resolution

480 X 546 P
Battery Life

280 Mah
Accelerometer

Yes
Heart Rate

Yes
Color

Black
Features

Wrist heart rate

Features of Lemfo C20

Color Black

Color

Black

Features Wrist heart rate

Features

Wrist heart rate

Key differentiators

Comprehensive health tracking with continuous heart rate, SpO2, and sleep monitoring.

Connects via Bluetooth 5.0 for smart notifications and data syncing with the DaFit app.

Extended battery life of up to 20 days on a single charge.

Features over 20 built-in sports modes to track a variety of activities.

Rugged design with 5 ATM water resistance for use in and out of the water.

Technology in Lemfo C20 smartwatch

Energy rating

Warnings

/ 5

1 Reviews

What our customers are saying about Lemfo C20 smartwatch

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Include AI Generated questions and answers

2026-07-20

Generated by AI and verified

What kind of health monitoring features does the Lemfo C20 offer?

Answer of Generated by AI and verified

The Lemfo C20 smartwatch is equipped with several health monitoring functions to help you track your physical condition. It provides continuous heart rate monitoring and allows for on-demand measurement of your blood oxygen saturation (SpO2). The watch also records your sleep, analyzing its duration to provide insights into your rest patterns.

* Generated by AI based on customer and product data

2026-07-20

Generated by AI and verified

What is the battery life of the Lemfo C20 smartwatch?

Answer of Generated by AI and verified

The Lemfo C20 features an impressive battery life, lasting up to 20 days on a single charge. This allows for extended use without the need for frequent recharging.

* Generated by AI based on customer and product data

2026-07-20

Generated by AI and verified

Does the Lemfo C20 have a built-in GPS?

Answer of Generated by AI and verified

No, the Lemfo C20 smartwatch does not include a built-in GPS function. It focuses on providing robust health and activity tracking through its other sensors.

* Generated by AI based on customer and product data

2026-07-20

Generated by AI and verified

Can I use the Lemfo C20 for swimming and other water sports?

Answer of Generated by AI and verified

Yes, the Lemfo C20 is well-suited for water activities. It has a 5 ATM water resistance certification, which means it can handle exposure to water, including swimming. Its rugged design also makes it a durable choice for various sports, on land or in water.

* Generated by AI based on customer and product data

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Frequently bought together

Best sellers

Use cases

Daily Fitness and Activity Tracking 90% Fit

With an accelerometer for step counting, continuous heart rate monitoring, and tracking for over 20 sports modes, this watch is a great companion for tracking daily activity and general fitness workouts. The long 20-day battery life ensures you can reliably track your stats without frequent charging.

accelerometer,heart_rate_monitor,sports_modes_count,battery_life_days

Swimming and Water Sports 80% Fit

The watch is certified with 5 ATM water resistance, making it suitable for swimming in a pool or open water, as well as other surface water sports. Its rugged fiber-reinforced polymer case adds durability for active use in and around water.

water_resistance,intended_use,case_material

Health and Sleep Monitoring 85% Fit

This smartwatch provides valuable health insights through its continuous heart rate monitor, SpO2 sensor for blood oxygen levels, and sleep tracking capabilities. It's a practical tool for beginners looking to monitor key health metrics and understand their sleep patterns.

heart_rate_monitor,spo2_sensor,sleep_tracking

Indoor and Gym Workouts 75% Fit

With 20 different sports modes, this watch can track a variety of indoor activities and gym sessions. The absence of GPS is not a limitation indoors, and you can still monitor your heart rate and activity duration effectively.

sports_modes_count,heart_rate_monitor,gps

Outdoor Hiking and Adventure 60% Fit

The watch's durable fiber-reinforced polymer case and 5 ATM water resistance make it resilient enough for outdoor adventures. While it lacks GPS for route mapping, it can still track your activity duration and heart rate during hikes.

case_material,water_resistance,intended_use

Best for

Best for Casual Daily Tracking

With seamless smartphone integration for notifications, continuous heart rate monitoring, and sleep tracking, it's a practical choice for everyday activity and health awareness.

Seamless Smartphone Integration: 80%

Great Value for Health Monitoring

This smartwatch offers key health monitoring features like a heart rate monitor, SpO2 sensor, and sleep tracking, providing affordable quality for those mindful of their budget.

Ideal for Getting Started with Fitness

Featuring 20 sports modes, continuous heart rate tracking, and a rugged, water-resistant design, it's a reliable and easy-to-use partner for starting a new fitness routine.

Advanced Fitness Tracking: 80%

Benefits

FunctionalMonitor key health metrics around the clock

Stay informed about your well-being with continuous health tracking. This watch monitors your heart rate throughout the day, measures blood oxygen levels with its SpO2 sensor, and tracks your sleep patterns to provide a holistic view of your health.

Heart rate monitor: yes

Spo2 sensor: yes

Sleep tracking: yes

Heart rate measurement mode: continuous

FunctionalTrack a wide variety of workouts and activities

With 20 different sports modes, you can accurately track a diverse range of physical activities. The built-in accelerometer helps capture your movement data, providing insights to support your fitness journey.

Sports modes count: 20

Accelerometer: yes

Ideal buyer profiles

This user is dedicated to their fitness journey and wants a device that can keep up with their active lifestyle. They engage in various sports and activities, requiring a durable and feature-rich tracker to monitor progress and stay motivated.

With over 20 sports modes, the Lemfo C20 is built for a varied fitness routine. Its 5 ATM water resistance and fiber-reinforced polymer case provide the durability needed for adventure and water sports. Continuous heart rate monitoring, an SpO2 sensor, and sleep tracking offer comprehensive health insights to support peak performance.

The Buyer

This buyer seeks a smartwatch that delivers essential features and reliable performance without a high price tag. They prioritize core functionalities like activity tracking, health monitoring, and durability, looking for the best value for their investment.

This watch provides a robust set of features, including continuous heart rate monitoring, an SpO2 sensor, 20 sports modes, and 5 ATM water resistance. These capabilities, combined with its long battery life, offer excellent functionality and durability at an accessible price point.

Competitive features

When evaluating the Lemfo C20 Smartwatch alongside its competitors like the Imilab Kw66 and Haylou RS4 Plus, the most significant differentiators emerge from the product's specific design focus rather than from the provided technical specifications. While all models are positioned at a similar price point, the Lemfo C20 distinguishes itself with features detailed in its description, such as its rugged, shock-resistant build and 5 ATM water resistance, which are explicitly tailored for outdoor and sports use.

Where it excels

The Lemfo C20 is built for durability, featuring a rugged, shock-resistant design and 5 ATM water resistance, making it a reliable choice for outdoor adventures and water sports. It offers extensive fitness tracking with over 20 sports modes, complemented by health monitoring features like heart rate, SpO2, and sleep analysis. With a battery life of up to 20 days on a single charge, it provides exceptional longevity, minimizing the need for frequent charging during extended activities or travel.

Consider alternatives if...

Verdict

The Lemfo C20 Smartwatch is a strong contender for users who prioritize durability, long battery life, and comprehensive fitness tracking in an affordable package. Its rugged construction and 5 ATM water resistance make it particularly well-suited for active individuals involved in sports and outdoor activities. While it shares a price bracket with its competitors, its standout features are its robust build and impressive battery performance, offering significant practical benefits for its target audience.

Specs comparison

	Lemfo C20 smartwatch	Lemfo Lemz Smartwatch
Battery Life	20 days	5 days
Water Resistance	5 Atm	ip68
Screen Size Inches	1.71 inches	1.39 1.2 - 1.8

Specs vs competitors

	Lemfo C20 smartwatch	Blackview W60 Smartwatch	Cool Adventure Smartwatch	Blackview W50 Smartwatch	Blackview W70 Pro Verde Smartwatch	Beafon Bea·fon 401 Black 1.43´´ Amoled Smartwatch
Battery Life	20 days	5 days	7 days	30 days	20 days	7 days
Water Resistance	5 Atm	ip68	ip67	10 Atm	water resistance	ip67
Intended Use	Adventure and/or water sports	Outdoor	-	-	Outdoor	-
Charging Time	2	-	-	-	-	2
Gps	false	false	true	false	false	false
Touchscreen	true	true	true	true	true	true
Battery Type	rechargeable lithium	rechargeable lithium	Lithium	370 mAh	Li-Ion	Lithium-Ion
Screen Size Inches	1.71 1.2 - 1.8	2.01 inches	1.43 inches	1.39 inches	2.01 inches	1.43 inches
Battery Life Days	20 hours	2 days	7 hours	30 days	20 days	7 hours
Sports Modes Count	20	multiple	5	100	110	-
Spo2 Sensor	true	-	true	true	true	true
Heart Rate Measurement Mode	continuous	continuous	continuous	continuous	continuous	-
Compatibility Os	Android 6.0 or higher, iOS 9.0 or higher	-	-	-	Android 5.0, iOS 9.0 and above	Android 4.4 / iOS 9 and later
Accelerometer	true	-	true	-	-	true
Screen Resolution	280 x 320	280x320	466x466 px	-	280x320 px	466 x 466
Smart Notifications	true	true	true	true	true	true
Case Material	fiber-reinforced polymer	fiber-reinforced polymer	Fiber-reinforced polymer	Glass + plastic	-	Plastic
Type Of Home Diagnostic Monitor	Smartwatch	Smartwatch	Smartwatch	Smartwatch	Smartwatch	Smartwatch