Elecsmart White Wooden Grain Design White Light Decorative Desktop Alarm Clock with Time and Temperature Display - Sound Control - Latest Generation (Usb/4xaaa) Fashionable and portable digital desktop alarm clock for home & office Produced with natural material bringing you a healthy and fashionable low-carbon life, and number dispaly is available at dark night SIZE: 15*4*7cm, Weight: 350g It also can work by voice when you clap your hands, or make some equivalent noise. Sound control switch regulate freedom. Daul Power Supply: 4 AAA dry batteries or DC 5V/500mA