There might be 2-3cm errors of dimension data due to manual measurement. ❥Two 10 batteries supply power for the luminous and display respectively, and the normal standby time is 2 years. (include) 1pc Electronic Clock There might be slightly color difference due to different light and effect. Material: abs Size: as shown ❥Embedded buttons the feel of the buttons while misoperation. The buttons with integrated functions are easy to use and simple to set up time. ❥The mute and compact design make it suitable for examination, study, work and other occasions that need time ❥Green luminous, bright and not dazzling ❥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 ❥Two 10 Batteries Supply Power For The Luminous And Display Respectively, And The Normal Standby Time Is 2 Years. (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 There Might Be 2-3cm Errors Of Dimension Data Due To Manual Measurement. ❥Green Luminous, Bright And Not Dazzling ❥The Mute And Compact Design Make It Suitable For Examination, Study, Work And Other Occasions That Need Time