SPA Tool Battery or USB Powered Mini Cube Black Wood Red LED Clock - Time Display & Sound Control Multifunctional clock - can display date, time, temperature, and can also used as an alarm clock. Material: Medium-density fiberboard Wood(not real wood) and graining coating. Color: as shown(If you don't know how to set this clock, please follow our clock User Manual to set it), Size:6cm6cm6cm; Power Supply: Powered by USB cable or 4 x AAA batteries (not included). Sound Control - It can work by voice when you clap your hands, or make some equivalent noise. Sound control switch regulate freedom. Modern simplicity design, LED light glows through the wooden finish for a clean modern look. Matches perfectly with any modern designed office or home furniture.We did test it very carefully before we shipped it out and it worked perfect. Thank you for your great understanding.