It is possible to measure up to a maximum of 100 hours, ideal for research and experiments Set easy 10 key method Display switching time and timer Model Number: TD-375 (White) Set time: up to 99 hours 99 minutes 99 seconds / minimum 1 second Volume: 70dB or more Power: DC1.5V LR44 type battery one use Product dimensions: D12.3 ~ W63 ~ H58mm