The Function of the BOSAI digital timer Small and handy, Easy to use. With magnetic holder. non-slip rubber coating. Easy to place any iron surface and stick it to the fridge, door, etc. Memory function.Reminder of the last countdown, automatic standby Time up to 99 min, 59 sec. Quality plastic material (ABS) for long-lasting use Specification Weight：90g Material: ABS Voltage: 4.5V Length: about 78mm Installation: For hanging or Lay flat on the table Working temperature: 0-50 degree Time of endurance: 4-6 months Timing range: 0-99 minutes and 55 seconds 3-level delay alarm to remind, mute , 60-75DB, 80-90DB Constant Light Mode will keep timer light up when working and keep you see the time across the room