From inside (document excerpt):
No. IR-1 Infrared Refrigerant Leak Detector Operator’s Manual Manual del operador Manuel de l’opérateur The TIF No. IR-1 uses infrared optics to create a refrigerant leak detector that combines sensitivity, speed, battery life, portability, and ease of use. This unit detects leaks as small as 0.15 oz/year, and meets both SAE J1627 and J2791 standards. The IR-1 comes with a wall charger and a car charger for its compact lithium-ion battery–which can power the leak detector for up to eight hours of continuous operation before needing to recharge.
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A choice of three sensitivity settings keep false alarms to a minimum while allowing detection of even the smallest leak in a refrigerant contaminated environment. A 30-second, selfcalibration test occurs whenever the unit is powered on to ensure optimal performance. A built-in replaceable filter blocks moisture and particulates, preventing damage to the sensor. Sensing element: enhanced infrared photo optics Refrigerants: HFC, CFC, HCFC, and blends Sensitivity level (per SAE J2791): HIGH: 0.15 oz/year and higher MED: 0.25 oz/year and higher LOW: 0.5 oz/year and higher Response time: less than one second Battery life: up to 8 hours continuous use before recharge Auto Off: 10 minutes of inactivity Battery: 3.7V, 1800 mAH rechargeable, lithium-ion (No. TIFIR-9) Low battery LED: illuminates when 1 hour of battery life remains Charge time: less than 4 hours @ 300 mA Operating environment: 32ºF (0°C) to 122ºF (50°C) at …