Function: LED display, snooze, alarm clock, dual USB output, power-off memory, automatic dimming, night light, vibration reminder Compatibility: Dual USB output supports charging for Android phones and other USB-powered devices Brightness adjustment: Features a high-sensitivity photosensitive sensor for automatic brightness adjustment based on ambient light; manual brightness settings with three levels (high, medium, low) for the clock display. Night light offers four-level manual brightness adjustment Memory function: Built-in CR2016 button battery maintains time and settings when external power is disconnected Power supply: Requires 5V1A5V2A DC power adapter (adapter not included); includes 1.5m DC power cable Color: White Material: ABS Dimensions: 158 x 55 x 87mm Package Contents: 1 x Alarm clock 1 x Vibrator 1 x USB cable Note: Light reflection and differences in display screens may cause slight variations in color appearance. Measurement error allowance: +/- 13cm Only the items listed are included; additional products shown are not part of the package