General description This 16.5 inch Bluetooth LED digital clock features advanced Bluetooth 5.3 technology for automatic time synchronization, eliminating the need for manual time-setting. The digital calendar can sync with your phone's time at the touch of a button, ensuring precision with automatic calibration four times a day. With 11 color modes, including 6 single colors and 3 RGB flowing gradient colors, you can customize the display to suit your preferences and environment. Technical specifications Size: 16.5 inches Power Supply: EU Plug (100-240V) Material: ABS Power Cord Length: 9.5 ft Backup Battery: 2 x AAA batteries (not included) Measurement Error: +/- 1-3 cm Compatibility and accessories Compatible with devices supporting Bluetooth 5.3 Includes remote control for operation from up to 32 ft Complimentary double-sided tape for easy wall mounting Installation No drilling required; easily attach to the wall with double-sided tape Usage Operated via mode button or remote