Anjank Alarm Clock has back up battery function, clock, radio and alarm functions are still works, can still wake you up in the morning if the table clock only powered by back-up batteries, so you dont need to worry about the power outage. Small size design help you save room when place the clock on homes table, nightstand, bedside or office s desk. Dual usb ports provide 5V/2.1A power can charge almost all digital devices, like iphone or android phone at the same dual alarms design, besides 10 minutes snooze time. Temperature display - The clear LCD screen not only shows the time, but also tell the indoor temperature, so you can know and choose the perfect temperature for sleep. Easy switch Fahrenheit to centigrade with C/ switch button on the back.