Dear: High Quality，wish you like it! Specification:Color: Black?Operating Temperature: 0¡ãC to 52¡ãC (30¡ãF to 125¡ãF)Maximum Sensitivity: 6gr/yr for all halogenated refrigerantsBattery Life: Approximately 50 hours for normal useResponse Time: InstantaneousWork Mode: Continuous， no limitationsFixed Probe Length: 17cm/6.5inWarm-up Time: Approximately 6 secondsReset Time: 2 to 10 secondsPowered By: 4 * AAA 1.5V batteries (not included)Package Size: 8.2 * 5.3 * 23.2cm / 3.23 * 2.09 * 9.13in?Package List:1 * Detector1 * Carry/storage Case?1 * Users Manual (English)