Power Supply: 3 x AAA alkaline batteries Measurement Range: 0-1000 PPM Sampling Method: Diffusion type Probe Length: 260 mm Alarm: Configurable high and low threshold alarms Alarm Modes: Buzzer, Light, Vibration Applicable Gases and Use Cases: 1. Reacts with all halogen gases (including chlorine and fluorine), but not limited to them. Applicable gases include: CFCs (Chlorofluorocarbons): R11, R12, R500, R503, etc. HCFCs (Hydrochlorofluorocarbons): R22, R123, R124, R502, etc. HFCs (Hydrofluorocarbons): R134a, R404a, R125, etc. 2. Detects gases used in medical equipment, such as ethylene oxide and ethanol. 3. Detects Halon gases used in fire suppression systems. 4. Used in air conditioning, refrigeration systems, and refrigerant recovery equipment. Color:As Shown Material:Plastic Package Contents: 1 * Refrigerant Leak Detector 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.