Elecsmart Black Wooden Grain Design Green 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 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 SIZE: 15*4*7cm, Weight: 350g