Material:HIPS Specification:13.2*3.1*7.3cm How to use:Open the back cover, put the battery into it,then adjust correct time. This product supports to set time and set the clock. Caution:Use carbon battery. Forbid the use of alkaline battery. Do not use battery for more than 6 months. Please replace the batteries when the time is not correct or stop working, otherwise the leakage of batteries will corrode circuit and movement. Beautiful and simple Alarm Clock. Brand MINISO SKU 100648399_NP-1021090498