Material: ABS Color: white, green, blue, black, , gray Size: 65* *14mm (2.56*0.98*0.55inch) Power by:AG10 battery (included) Weight: 16g Qty:1pcs Application: study room, office,library, public place etc.. Specifications: Features: Brand new and high quality. Two AG10 batteries supply power for the luminous and display respectively, and the normal standby time is 2 . (include) High-quality ABS material, especially matching the quartz of the circuit board, the error of 0-3 seconds in 24 hours under normal temperature environment, reaching the international standard Green luminous, bright and not dazzling Embedded buttons ensure the feel of the buttons while preventing misoperation. The buttons with integrated functions are easy to use and simple to set up time. The perfect mute and compact design make it suitable for examination, study, work and other occasions that need time Package Included: 1* Electronic Clock Notes: Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!