Overview: Detects ALL halogenated refrigerants & halogen compounds (such as CFCs R12, R11, R500, R503, etc/HCFCs R22, R123, R124, R502, etc/HCFCs, R134a, R404a, R125, etc/ Compounds AZ-50, HP62, MP39, etc) Warms up in 6 seconds after power on No manual-adjustment needed Van-speed sensitivity adjustment 20cm flexible sensor probe Automatically calibrates & adjusts sensitivity Tricolor battery voltage indication Equipped with quality high sensitivity 6gr/yr sensor Ultra-low power consumption IC circuit design -- 50 hours typical usage time before batteries drain Powered by 4 x AAA batteries (sold separately) English user's guide & carrying pouch