Specification:
Cigarette lighter plug: 7.7x2.6x1.9cm
Product size:Approx. 13.7x5.3x7.3cm
Package size: Approx.14.4x10.2x6.2cm（LxWxH）
Cable length:1.5m
Product working voltage:5V
Car working voltage:12-30V
Working tempature:-1℃~+70℃ (but the range of the temperature can be displayed is -9~+50℃)

Features:
Music，river glide and bird sound to be alarm bell
Display hour，minute and temperature on same screen
Alarm function， Avaliable 6 groups alarm time

Note:If the backup battery is power off and the time can't be memoried， pls replace new battery.  :)

Package Included:
1x 12-24V Car Voltage Digital Monitor Battery Alarm Clock LED Temperature Thermeter
2x Glue
1x User Guide