Feature: LED Clock: The 3D LED wall clock is perfect for living room, bedroom, office, gym, workplace, basement, etc. MULTIFUNCTION: The digital wall clock has 12/24 hour display, time, temperature, alarm clock and night light. USB CABLE ORDER: The small digital clock is powered by a USB cable, and the cable can be hidden behind the clock. Looks cool to decorate your home or work place. REAL-TIME TEMPERATURE FACTOR: The LED alarm clock has an upper sensor design that can feel the current temperature at any time and provide a reference. Double power supply: When the external power is off, the internal power starts to power up and the clock normally time without worrying about data loss over time. Specification: Item Type: Clock Material: ABS R Size: Approx. 23x9.3cm Gross weight: approx. 229g/8.1oz Battery: 1 x CR2032 Button Cell (Included) Power adapter: USB power adapter Package List: 1 x Clock 1 x USB cable 1x User Manual 1. 2. Memory function, it will keep the time data when the power is off, no need to reconnect to set the time. 3. The built-in battery records the time in the event of a power failure, and the clock is only powered by the USB cable. 4. Please read the instruction manual before using this product and keep it in a safe place for future use. 5 When the external power is off, the internal power starts to power up, the clock normally time, but the LED screen has no display, and enters power saving mode.