Freon leak detectors trigger on R22, R134A, R404a, R410A and all halogenated refrigerants (including HFC, CFC, HCFC and mixtures).
Audible and visual gas leak indicator and dual battery indicator.
Will react to all halogenation. This includes but is not limited to:
After rotating the switch, the detector is ready for use.
1-7 level selectable sensitivity

Response time: 3s
Working temperature: 0℃-52℃ (30℉ to 125℉)
The highest sensitivity to all halogenated refrigerants: 0.21oz/yr
Battery life: about 50 hours of normal use
Operation mode: continuous and unlimited
Fixed probe length: 7.87 (in)
Dimensions: 1.37 x 1.37 x 5.90 inches
Warm-up time: about 6 seconds
Reset time: two to ten seconds
Power supply: 6V DC, 4 AAA alkaline batteries. (not include)
Colour: Black
Material: Plastic

Package Contents:
1 x detector

Only the above package content, other products are not included.
Note: Light shooting 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.