CHKOSDA Digital LED Wall Clock User Manual

1. Safety Information

Please read all safety instructions carefully before using the product. Failure to follow these instructions may result in electric shock, fire, or damage to the device.

• Do not expose the clock to extreme temperatures, direct sunlight, or high humidity.
• Keep the device away from water and other liquids.
• Use only the provided USB cable and a compatible power adapter (not included) for power.
• Do not attempt to disassemble or repair the clock yourself. Contact qualified service personnel for assistance.
• Ensure the clock is securely mounted if wall-hanging to prevent it from falling.
• The CR2032 coin cell battery is for memory backup only and does not power the clock.

2. Product Overview

2.1 Package Contents

• CHKOSDA Digital LED Wall Clock (Green)
• Remote Control
• USB Power Cable (approx. 10 feet)
• User Manual

2.2 Product Features

• 6-inch LED Digits with 8-Level Brightness Adjustment: Large, clear digits are easy to read from a distance. Brightness can be manually adjusted or set to automatic dimming based on ambient light.
• Slim Bezel Design: Designed with a narrow bezel to maximize digit size. Constructed from flame-retardant, lightweight, and durable ABS plastic.
• Corded Power & Energy Saving: Powered by a stable USB connection. The 10-foot USB cable allows connection to laptops, PCs, or power banks. A CR2032 coin cell battery (not included) can be installed to maintain time settings during power outages.
• Large Visual Countdown Timer: Supports countdown up to 999 days, 23 hours, 59 minutes, 59 seconds. Can also be set for minute or second countdowns.
• Enhanced Functionality: Includes 4 new memory chips for more accurate timing, upgraded CPU chip for wall clock, improved refresh rate for stable LED display, and extended remote control distance up to 49 feet (without obstacles).
• Multi-functional Display: Shows time, date, temperature, and features alarm, count-up, and countdown functions.

Figure 2.1: Front view of the CHKOSDA Digital LED Wall Clock.

3. Setup

3.1 Mounting Options

The clock can be either wall-mounted or placed on a table using the integrated support bracket.

• Wall Mounting: The clock has two hanging holes on the back. Use appropriate screws (not included) to secure it to a wall.
• Tabletop Placement: Utilize the built-in support bracket to stand the clock on any flat surface.

Figure 3.1: Back view and dimensions of the clock, highlighting mounting points and connections.

3.2 Power Connection

Connect the provided USB cable to the clock's USB port. Plug the other end into a compatible USB power source such as a USB adapter (5V/1A recommended), power bank, laptop, or PC.

• The clock requires continuous power via the USB cable to operate.
• A CR2032 coin cell battery (not included) can be inserted into the battery compartment to retain time settings during power interruptions. This battery does not power the display.

Figure 3.2: Compatible USB power sources for the clock.

4. Operation

4.1 Remote Control Overview

All functions of the clock are controlled via the included remote. Ensure 2 AAA batteries (not included) are installed in the remote control.

4.2 Setting Time

1. Press the MODE button on the remote to enter time setting mode.
2. Use the UP and DOWN buttons to adjust the hour.
3. Press MODE again to move to minute setting. Adjust minutes using UP and DOWN.
4. Continue pressing MODE to cycle through date, year, and temperature settings, adjusting each with UP and DOWN.
5. Press MODE one last time or wait a few seconds for the settings to save and exit.
6. To switch between 12-hour and 24-hour format, press the 12/24H button on the remote.

Figure 4.1: Switching between 12-hour and 24-hour time display.

4.3 Setting Alarm

The clock supports setting multiple alarms (up to 16 sets). Refer to the detailed instructions in the manual for specific alarm setting procedures.

Figure 4.2: The clock's alarm function, capable of setting multiple alarms.

4.4 Countdown / Count-up Timer

The clock features both countdown and count-up (stopwatch) functions.

• Countdown: Press the CD SET button on the remote to enter countdown setting mode. Use the number buttons and MODE to set days, hours, minutes, and seconds. Press PLAY/PAUSE to start or pause the countdown.
• Count-up (Stopwatch): Press the ST button to start the stopwatch. Press PLAY/PAUSE to pause/resume, and RESET to clear.

Figure 4.3: The large timer function in use, showing a countdown.

Figure 4.4: Stopwatch and countdown timer functions with remote control interaction.

4.5 Brightness Adjustment

The clock offers 8 levels of brightness adjustment and an automatic dimming mode.

• Automatic Dimming: Press the AUTO DIMMER button on the remote to enable automatic brightness adjustment based on ambient light.
• Manual Adjustment: Use the BRIGHTNESS + and BRIGHTNESS - buttons on the remote to cycle through the 8 brightness levels.

Figure 4.5: Brightness adjustment options, including 8 manual levels and automatic dimming.

4.6 Calendar and Temperature Display

The clock can display the current date and indoor temperature. These modes can be cycled through using the MODE button or dedicated buttons on the remote if available.

5. Maintenance

To ensure the longevity and optimal performance of your CHKOSDA Digital LED Wall Clock, follow these maintenance guidelines:

• Cleaning: Gently wipe the display and casing with a soft, dry, lint-free cloth. Do not use abrasive cleaners, solvents, or chemical sprays, as these may damage the surface.
• Dust Removal: For dust accumulation in crevices, use a soft brush or compressed air.
• Power Disconnection: Always unplug the clock from the power source before cleaning or when it will not be used for an extended period.
• Battery Replacement (CR2032): If the time settings are not retained after a power outage, replace the CR2032 coin cell battery in the back compartment. Ensure correct polarity.

6. Troubleshooting

If you encounter issues with your clock, please refer to the following table for common problems and their solutions.

7. Specifications

8. Warranty and Support

CHKOSDA products are manufactured with high-quality materials and undergo strict quality control. This product is covered by a standard manufacturer's warranty against defects in materials and workmanship from the date of purchase.

For warranty claims, technical support, or any questions regarding your product, please contact our customer service team. Please have your model number (CH3387-G) and purchase details ready when contacting support.

Contact information can typically be found on the product packaging or the retailer's website where you purchased the item.