Operating environment:-10 C -52 C relative humidity (50%-85% RH)Storage temperature:-20 Cto 60 C(-4 Fto 140 F) It responds to ALL halogenated (containing chlorine or fluorine) refrigerants, including:CFCs - e.g. R11, R12, R500, R503 etc.HCFCs - e.g. R22, R123, R124, R502.HFCs - e.g. R125, R134a, R404a.Blends including -50, HP62, MP39 etc Detect ethylene oxide gas leaks in hospital equipment,Detect -6 in high voltage Detect most gasses that contain chlorine, fluorine and bromine (halogen gasses) Detects cleaning agents used when dry cleaning such as perchloroethy,Detects halogen gasses in fire extinguishing systems<br><br>Charging current:5VDC 1A Sensor principle: heated diode Sensitivity: max 4g/ yr Alarm mode: sound and light alarm, LCD display Battery: built-in rechargeable lithium battery 3.7V 3000mAhWorking time:continuous 6H Charging: 4 hours Note: Due to different production batches, there may be slight differences in products. Colour:Photo Color Material:Plastic<br><br>Package Contents: 1 x Halogen leak detector with probe<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.