This Multifunction Digital Clock is Constructed with Mdf & PVC Material. It Displays Both Time & Temperature on the Screen Simultaneously. the Clock Features a Sound Control Mode (power-saving Mode), Where the Screen Turns Off After 10 Seconds, & You Can Light It Up by Clapper Your Hands. It Allows You to Set Up to 3 Alarms & Can be Powered by Either 4 Aaa Batteries (not Included) or Via Usb. the Clock Complies with Cpsia Regulations & Measures 5.9 Inch in Length, 2.8 Inch in Width, & 1.6 Inch in Height.