Check the listing for details. Refrigerant Leak Detector with LED Light, Halogen Leak Detector (Yellow). Condition: New. Listed at 26.99 USD. 【Two-Color LED Light】The Freon tester comes with black light + white flashlight. black light is used with fluorescent agent, white light is suitable for illuminating dark and small places.(LED light contains battery) 【Upgraded Version of WJL-6000】WJL-6000Pro halogen leak detector is the upgraded version of the classic WJL-6000 with higher sensitivity. New upgraded LCD screen displays sensitivity level and refrigerant gas leakage level, even multiple alarm functions. 【Higher Sensitivity】7.9 inch flexible sensing tip with with higher sensitivity(up to 0.11oz/yr.) that compared with WJL-6000(0.21oz/yr) 【Visualization of leakage levels】The new upgraded LCD screen will display the leakage level of refrigerant gas. In addition, adjust the sensitivity by pressing the button, LCD screen will display sensitivity level. 【Multi-Alarms】The audible and visual display alarms in the leakage tester can easily help you to locate where the leakage is. Once leaking gas is detected, the beep frequency will increase. The more gas leaked, the quickly the buzzer beeps, at the same time, the LCD screen displays the leakage level. Ideal Tools for Freon and Halogen Leak detecting WJL-6000 Halogen Leak Detector featuring classic outlook and portable size, it can detect all CFCs, HFCs, HCFCs, and blends, including but not limited to R22, R410A, R134A. 1-7 grade sensitivity selectors can be adjusted at any time automatically to the best state of detecting. Inner precise IC with ultra-low power consumption circuit design, more stable, longer battery life. Siren sound and flashing light for the leak alarm indicator. Features Compact Size Compact size for easy carry around. Comes in a carry bag. Full Function Flexible probe 1-7 Levels sensitivity adjustable Sound and LED visual alarms Long Lasts Powered by 4*AAA batteries( Not Included). Working time is over 50 hours for normal use. Instruction and Notes:Preheating: Wait for 6 seconds away from the potential leakage area once the leak detector is switched on for more accurate detection or it may not give the right alarm when you try to detect.Alerting: 2 beeps per second when the detector is open, 10 beeps per second when a leak is detected.LED indicator: Green-the battery voltage is normal to use.Orange-the battery voltage is close to the limit, needs to be replaced.Gas supported:CFCs e.g.R12, R11, R500, R503 etc. HCFCs e.g. R22,R123, R124,R502 etc. HFCs e.g. R134a, R404s, R125, R1234yf etc.Blends such as AZ-50. HP62. MP39 etc.