1. 4-digit clock function: hour, , default 12-hour , 2. 12H and 24H can be converted 3. Timing function: Count up/Down Timer,Count range:0~99'59'' 4. Buzzer alarm, OPTION selects the sound frequency 2KHz or 4KHz 5. With key tone function 6. Volume:3-levels Alarm Volume 7. Timer memory recall function Application: Perfect for Cooking, Sleeping, Outdoor Sports,Yoga and Work, Make Your Works and Rest Time More Efficient. Power supply:2 *AAA (3V) not include battery Working temperature: 0---50 Quiescent current:Less than 20uA Colour:White Material:ABS Package Contents: 1 x timer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.