Item Type: Digital Alarm Clock Material: Plastic Display Type: Number Screen Type: LED Battery: 3 x 7 Batteries or USB Cable (Battery Not Included) Product Size: Approx. 16 x 6cm / 6.3 x 2.4in ( Manual Measurement, Slight Error May Exist ) Package List 1 x Digital Alarm Clock 1 x USB Cable 1 x User Manual 112/24 Hour System: This LED clock adopts 12/24 hour system, which can be easily switched according to your preference, easy to operate. 2Temperature Display: This bedroom clock support temperature display and units conversion( and ) , meeting your basic needs for daily life. 3Large Screen: This bedroom clock is designed with large screen that can clearly display the numbers and characters, and it supports always on mode and power saving mode. 4USB Or Battery Powered: This small digital clock can be easily powered by USB cable(cable included) or 3 AAA batteries(battery not included), offering great convenience. 5Wide Application: This small digital clock with large curved LED screen is perfect for desk, bedroom, living room, office, dormitory, etc.