【Dual Leak Detection Modes】The Combustible Gas Leak Tester measures gas leaks in both *PPM * for ultra-sensitive detection and *LEL% * for combustible gas safety. 【Audible & Visual Alarm with Mute Function】When a leak is detected, a result will appear in digital display and audible tone will change to a siren sound. Press the MUTE button to turn on/off the buzzer 【Upgraded Probe】All-metal design, dirt-proof & wear-resistant of the halogen leak detector probe that is very friendly to repair engineers 【1800 mAh Rechargeable Battery】The 1800 mAh battery of the Gas Leak Detector provides over 20 hours operation. Note: Charging cable not included. Please use any Type-C cable for charging. 【Quick Response】Response combustible gases in just 2 seconds, while ensuring ultra-precise refrigerant identification within 10 seconds for comprehensive safety, Manufacturer: Therm La Mode