Product Name: Explosion-proof Timer Introduction: 1. Three independent stopwatch displays to calculate overlapping time. 2. Largest time range: 100 hours. 3. Battery life indicator function. 4. Can view records during/after measurement. Technology parameters: 1. Working time: 100 hours 2. Accuracy: ± 0.0012% 3. Water-proof: 50m 4. Dimension: 71.5 60 21mm 5. Weight: 61g