1. Product Overview
The cofuo Kids Digital Sport Waterproof Watch is designed for children, featuring multiple functions including time display, date, alarm, stopwatch, and a colorful LED backlight. It is built with durable and child-safe materials, offering water resistance suitable for daily activities.

Figure 1: Watch Button Functions. This diagram illustrates the location and primary function of each button on the watch: Light, Mode, Start/Stop, and Reset.
2. Setup and Initial Use
2.1 Setting Time and Date
- Press the MODE button repeatedly until the time display flashes.
- Use the RESET button to adjust the flashing digit (hours, minutes, etc.).
- Press the START/STOP button to move to the next digit or setting (e.g., from hours to minutes).
- Once all settings are correct, press the MODE button to exit the setting mode.
2.2 Activating Backlight
To activate the LED backlight, press the LIGHT button. To change the backlight color, press and hold the LIGHT button for 3 seconds. The watch features 7 different backlight colors: dark blue, green, red, sky blue, orange, pink, and purple.

Figure 2: Backlight Functionality. This image demonstrates the watch's normal display and the vibrant EL light display with its seven adjustable colors.
3. Operating Functions
3.1 Stopwatch
- Press the MODE button until the stopwatch display appears (usually '00:00:00').
- Press the START/STOP button to start the stopwatch.
- Press the START/STOP button again to pause the stopwatch.
- Press the RESET button to reset the stopwatch to zero.
3.2 Alarm Setting
- Press the MODE button until the alarm setting display appears.
- Use the RESET button to adjust the flashing digit (hours, minutes).
- Press the START/STOP button to move to the next digit.
- Press the MODE button to confirm and exit the alarm setting mode.
- To turn the alarm on or off, press the START/STOP button while in the alarm display mode. An alarm icon will indicate if it's active.
4. Maintenance and Care
4.1 Water Resistance
The watch is 3 ATM (30 meters) water resistant, making it suitable for swimming, surfing, showering, hand washing, and rain. However, it is crucial to NOT press any buttons while the watch is submerged in water. Excessive water contact or use in extreme hot or cold temperatures can shorten the watch's lifespan.

Figure 3: Water Resistance Features. This image highlights the watch's 30M water resistance, suitable for various water activities like washing hands, showering, and swimming.
4.2 Cleaning and Storage
- Clean the watch regularly with a soft, damp cloth. Avoid harsh chemicals.
- Store the watch in a dry place away from direct sunlight and extreme temperatures.
- The silicone strap is designed to be water and sweat-proof.
4.3 Battery Replacement
The watch uses 1 CR2 battery. When the display dims or functions become erratic, it may be time to replace the battery. Battery replacement should ideally be performed by a qualified technician to ensure water resistance is maintained.
5. Troubleshooting
- Watch not turning on or display is blank: Check the battery. If the watch is new, ensure any protective plastic tabs are removed from the battery compartment.
- Time is incorrect: Follow the 'Setting Time and Date' instructions in Section 2.1 to reset the time.
- Alarm not sounding: Ensure the alarm function is activated (look for the alarm icon on the display). Check the alarm time setting.
- Backlight stuck on or not changing colors: Try pressing and holding the LIGHT button for 3 seconds again. If the issue persists, a battery reset (removing and reinserting the battery) might resolve it, but this should be done carefully to avoid damaging the watch or compromising water resistance.
- Water ingress: If water appears inside the watch, stop using it immediately and contact customer support. Avoid pressing buttons while the watch is wet.
6. Specifications
| Feature | Specification |
|---|---|
| Model Number | CF-1100-DNS2 |
| Water Resistance | 3 ATM (30 Meters) |
| Functions | Time, Date, Day, Alarm, Stopwatch, 7-Color LED Backlight |
| Display Type | Digital LED |
| Battery Type | 1 x CR2 (included) |
| Materials | Stainless Steel (buckle), Resin (case), Silicone (strap) |
| Clasp Type | Buckle |
| Product Weight | 26g / 0.92 ounces |
| Dial Diameter | 35mm / 1.37 inches |
| Dial Thickness | 11mm / 0.43 inches |
| Band Width | 14mm / 0.55 inches |
| Band Length | 210mm / 8.26 inches |
| Min Wrist Length | 135mm / 5.3 inches |
| Max Wrist Length | 170mm / 6.7 inches |

Figure 4: Watch Dimensions. This diagram provides detailed measurements for the watch's band, dial, and suitable wrist sizes.
7. Warranty and Support
For any questions, concerns, or technical support regarding your cofuo Kids Digital Sport Waterproof Watch, please contact the manufacturer or seller through your purchase platform. Please refer to your purchase documentation for specific warranty details.
Manufacturer: cofuo





