Introduction
Thank you for choosing the XREXS 16.5" Digital Wall Clock, Model 3016LY. This clock features a large, clear display, automatic Bluetooth time synchronization, multicolor ambient lighting, and multiple functions including alarm, timer, and temperature display. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance and longevity of your device.
Product Features
- Automatic Bluetooth Synchronization: Automatically adjusts time and synchronizes daily with your smartphone after initial pairing.
- 6 Color Night Light Modes: Offers six distinct colors for ambient lighting, with five manual brightness levels.
- Automatic Dimmer Function: An integrated light sensor adjusts display brightness according to ambient light conditions.
- HD Display: 16-inch LED screen with 4.33-inch (11 cm) extra-large, high-contrast numbers for easy readability.
- Multifunctionality: Combines clock, alarm, and stopwatch functions, easily switchable via a mode button.
- Countdown/Stopwatch: Timer range from 0 to 99 hours, 59 minutes, 59 seconds.
- Power Source: Operates via a corded electric adapter. Includes two AAA batteries for memory backup of time and alarm settings during power interruptions.
Setup
1. Power Connection
Connect the provided power adapter to the clock and plug it into a standard electrical outlet. The clock is designed for continuous power supply and does not operate on battery power for its main functions.

Image: The digital clock connected to a wall outlet via its power adapter. Note that the clock requires continuous power and does not run on batteries for primary operation.
2. Battery Installation (Memory Backup)
Install two AAA batteries (included) into the battery compartment located on the back of the clock. These batteries serve as a memory backup to retain time and alarm settings in case of a power outage.
3. Bluetooth Time Synchronization
The clock features Bluetooth 5.1 technology for automatic time synchronization with your smartphone. No manual time setting is required after initial pairing.
- Ensure your smartphone's Bluetooth is enabled.
- Plug in the clock. The signal reception symbol on the clock display will begin to flash.
- On your smartphone, search for Bluetooth devices. The clock will appear as "C3016".
- Select "C3016" to pair. Once connected, the clock will automatically synchronize its time with your phone.
- Alternatively, you can initiate Bluetooth pairing manually by pressing and holding the mode button on the clock or the dedicated Bluetooth button on the remote control for 3 seconds.

Image: Effortless setup of the XREXS digital wall clock by syncing time via Bluetooth pairing with a smartphone.

Image: Close-up of the Bluetooth 5.1 chip, highlighting the precise time synchronization capability.
Operating Instructions
1. Display Modes (Time, Alarm, Timer)
Press the MODE button on the clock or remote control to cycle through the different display modes: Clock, Alarm, and Timer.

Image: The clock showcasing its multifunctionality, including standard time display, a count-up/down timer, and an alarm clock.
2. Brightness Control
The clock offers both automatic and manual brightness adjustments.
- Automatic Dimmer: The integrated light sensor automatically adjusts the display brightness based on the ambient light in the room. This ensures optimal visibility without being too bright in dark environments or too dim in bright ones.
- Manual Brightness: You can manually select from 5 brightness levels using the remote control or dedicated buttons on the clock.

Image: Illustration of the automatic dimmer and five manual brightness levels for the clock display.
3. Multicolor Ambient Night Light
The clock features a multicolor ambient light strip at the bottom. You can choose from 6 different colors to suit your preference or room decor. Adjust the brightness of the ambient light using the remote control.

Image: The clock showcasing its 6 selective RGB night light modes and adjustable brightness.
4. Time Format (12/24H) and Temperature Unit (°C/°F)
You can switch between 12-hour and 24-hour time formats, and between Celsius and Fahrenheit for temperature display. Refer to the remote control or clock buttons for specific controls to toggle these settings.

Image: Multiple display styles for time (12/24H mode) and temperature (°C/°F).
5. Auto DST (Daylight Saving Time)
The clock supports automatic Daylight Saving Time adjustments. This feature ensures the time is automatically updated during seasonal changes, eliminating the need for manual adjustments.

Image: Automatic DST feature, showing time adjustments for different seasons.
Maintenance
To ensure the longevity and proper functioning of your XREXS Digital Wall Clock, follow these maintenance guidelines:
- Cleaning: Gently wipe the display and casing with a soft, dry, lint-free cloth. Avoid using abrasive cleaners, solvents, or spray cleaners directly on the clock, as they may damage the surface.
- Placement: Place the clock in a stable location, away from direct sunlight, extreme temperatures, and high humidity.
- Power: Always use the original power adapter provided with the clock.
- Battery Replacement: Replace the AAA backup batteries annually or when the clock fails to retain settings during a power outage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Clock display is off. | No power supply. | Ensure the power adapter is securely plugged into the clock and a working electrical outlet. |
| Time is incorrect after power outage. | Backup batteries are dead or not installed. | Install or replace the two AAA backup batteries. Re-sync via Bluetooth. |
| Cannot pair with Bluetooth. | Bluetooth on phone is off; clock is too far; interference. | Ensure phone Bluetooth is on. Move phone closer to the clock. Try pairing again. Restart both devices if necessary. |
| Display is too dim or too bright. | Automatic dimmer active; manual setting needed. | Adjust manual brightness settings using the remote control or clock buttons. Ensure the light sensor is not obstructed. |
| Remote control not working. | Remote battery dead; obstruction; remote out of range. | Replace the remote control battery. Ensure no obstructions between remote and clock. Point remote directly at the clock. |
Specifications
- Brand: XREXS
- Model: 3016LY
- Color: White
- Display Type: Digital LED
- Screen Size: 16.5 inches
- Number Height: 4.33 inches (11 cm)
- Product Dimensions: 38L x 14H cm (approximately 15 x 5.5 inches)
- Power Source: Corded Electric (AC adapter included)
- Backup Batteries: 2 x AAA (included, for memory retention only)
- Mounting Type: Wall Mount
- Special Features: Bluetooth 5.1 Sync, Automatic Dimmer, 6-Color Ambient Light, Alarm, Countdown/Stopwatch, Temperature Display, Auto DST
- Frame Material: Plastic
- Item Weight: 1.1 Kilograms
Warranty and Support
XREXS products are designed for quality and reliability. For any questions, technical support, or warranty claims, please contact XREXS customer service through the retailer where the product was purchased. Please retain your proof of purchase for warranty purposes.