Function 1 Plug-in use Cannot be powered by way of batteries, needs to be plugged in CR2032 is only used for energy failure reminiscence function 2 Time, temperature and date are displayed at the similar display screen 3 12/24H, ℃/℉ conversion Only 12/24H show and ℃/℉ conversion would be switched 4 Memory operate Built-in CR2032 button battery, the time aren't lost beneath the ability off state 5 two units of alarm clock Independent change control 6 40 types of ringtones for alternative Volume can be adjusted manually 7 Brightness adjustment 5 stages of brightness can be adjusted, you may modify the suitable brightness consistent with your individual habits, to create a snug night atmosphere 8 Dual placement Standing or hanging, with wall mounting holes Product Show Body Color:White/Black Size:26*7*3/10*2*1 USB Cable Length:150cm/59inch Can be wall-mounted/Table Plug:5V 1A/2A(Not Included) Package: 1xDigital Wall Clock 1xInstruction 1xUSB Cable Note:It has to plug in use,can now not be powered by way of battery just for Power-off memroy