Features: Function: LED display, snooze, alarm clock, dual USB output, power-off memory, automatic dimming, night light, vibration reminder. Compatibility: Dual USB output supports iPhone, Android phones, and various USB-powered devices. Brightness adjustment of the electronic clock: Equipped with a high-sensitivity photosensitive sensor, the display brightness automatically adjusts according to ambient light. Manual brightness settings offer three levels: high, medium, and low. Night light brightness: adjustable manually to four levels. Memory function: Built-in CR2016 button battery maintains time and settings when external power is disconnected. Power supply mode: Requires external 5V1A–5V2A DC power supply. Adapter not included. Includes one 1.5m DC power cable. Specifications: Material: ABS Electronic Clock: 158x55x87mm / 6.22x2.16x3.42inch Vibrator: 80x80x28.8mm / 3.14x3.14x1.13inch Note: 1. Please allow 1–2cm variation due to manual measurement. Ensure you are comfortable with this before ordering. 2. Due to differences in monitor displays, the product image may not reflect the actual color. Thank you for your understanding. Package includes: 1 x Electronic Clock 1 x Vibrator 1 x English Manual 1 x 1.5m USB Cable 1 x CR2016 Button Battery (with insulation)