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By certification 
Specifications:
Temperature Range: -121°F ~104°F, -85°C ~40°C
All accuracy: +/-1°F/ + 0.5°C
Resolution : 0.01°F/ 0.01°C
Data Capacity: 7200 group
Download speed: less than 5 seconds
Storage life: more than 5 years
Start: Press the start button three seconds
Battery: 3.6V, 0.4Ah cryogenic industrial batteries.
Shockproof performance: Withstands 3-foot (1 meter) drop to hard surface
Operating instructions: the red indicator flashes after starting
Selection Guide:
DI-05: Sampling interval 1 minute, record up to 5 days
DI-25: Sampling interval 5 minutes, record up to 25 days
DI-50: Sampling interval 10 minutes, record up to 50 days
DI-99: Sampling interval 20 minutes, record up to 99 days
Temperature Range: -121°F ~104°F, -85°C ~40°C
All accuracy: +/-1°F/ + 0.5°C
Resolution : 0.01°F/ 0.01°C
Data Capacity: 7200 group
Download speed: less than 5 seconds
Storage life: more than 5 years
Start: Press the start button three seconds
Battery: 3.6V, 0.4Ah cryogenic industrial batteries.
Shockproof performance: Withstands 3-foot (1 meter) drop to hard surface
Operating instructions: the red indicator flashes after starting
Selection Guide:
DI-05: Sampling interval 1 minute, record up to 5 days
DI-25: Sampling interval 5 minutes, record up to 25 days
DI-50: Sampling interval 10 minutes, record up to 50 days
DI-99: Sampling interval 20 minutes, record up to 99 days
