Elitech Infrared Refrigerant Leak Detector HVAC Halogen Tester Gas Selectable

Sensor principle: Infrared Spectrum Absorption Sensor life: 10 Years Sensitivity: Max 4g/year Alarm mode: Audio and Light alarm, TFT LCD display Automatic shutdown: 10 minutes without operation Battery: built-in rechargeable lithium battery 3.7V 3000mAh Working time: continuous 6H Charging time: 4 hours Operating environment: -10°C - 52°C relative humidity (50%~85%RH) Storage temperature: -20°C to 60°C(-4°F to 140 °F) Weight: 415g(14.6oz) Size: 201mm*86mm*38mm(7.9*3.3*1.5)