Multi-function Portable Cosmetic Mirror LED Clocks Dual-Use Mirror Alarm Clock Working voltage:2.2-5V Working temperature : 0℃~50℃ Power: Built-in 1* CR2032 battery(included) Battery life time:6-7 months Temperature measurement arrange: -10℃~ 50℃(14℉~122℉) Time error: ±30 seconds/month Alarm sound: BiBiBi Alarm volume: 60-75DB Product size: 75*93*12.6mm Product net weight:70.2g Portable Travel Alarm Clock with Makeup Mirror Multiple Features – Not only does it tell the date, day of week , time, and temperature, but also it has alarm clock feature Large Display: With bigger 2.8″ x 1.5″ LCD screen and clear bold digits, it is easy to read . Portable & Elegant : A minimized size of 3.56″ x 3.35″ x 0.5″, CR2032 button cell powered, compact and lightweight for easily pack or toss into your purse. Easy Operation : The intuitive setting button in front of the clock , easy to set the time or alarm for kids, seniors and the elderly. With Save Power Mode : Press and hold snooze button to switch off the display to enter save power mode . The battery can be used for 12 months With Backlight :The Travel clock has 5 second on-demand light which can be used to see the time at night. Folding Cover with Mirror: it is not only for safe storage during journey, the mirror is also an essential for everyday use.