Features: Detect all halogen gas leaks, including but not limited to refrigerants, such as-CFCs(R11, R500, R503) HCFCs(R22, R124, R502) HFCs(R123a, R404a), AZ-50, HP52 , MP39, ethylene-oxide, SF-6, carbon tetrachloride, halongen gas. The 7-level sensitivity is adjusted by the knob. Built-in high-precision voltage-regulator IC-and ultra-low power consumption circuit design make the work more stable and the battery more durable. Two color indications of battery-voltage. Accurate detection, rapid warm-up within 6 seconds. Specifications: Material:Plastic Size:Approx.15x3.5x3.3cm/5.9x1.37x1.29inch Type: halogen leak detector Working temperature: 0- 52 Battery life: about 50-hours (normal use) Response time: instantaneous Probe-length: 20cm/7.87 inches. Warm-up: about 6 seconds Reset-time: 2 ~ 10 seconds Power supply: DC6V, 4xAAA (excluding) Measurement object: halogen gas and halogen refrigerant. Package Includes: 1x Gas Leak Detector note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.