Perman Portable Temperature Display Sounds Control LED Electronic Desktop Digital Creative Wooden Alarm Clock (Black + White) Wooden Wooden Material : MDF + PVC. Contracted design style wooden alarm clock. Size: 14.7*7.8*7.0cm, Dual Power Supply: DC 6V input or by battery (4 x AAA) not included. Time display: 12-hour or 24-hour mode. Alarm Clock with "beep" lasting for 1 minute. Nearby can wake it up. Displaying dempeterature , C/F displaying of thermometer. It also works in voice mode. Make some noise (clap your hands, rap on the table or pat the clock). The "VOICE" mode only available when you use the batteries, that is the "Power Saving" mode.