Hand-held design for easy operation, can detect all kinds of halogen refrigerant gas, LED display to show the relative leak size, less than 20 seconds warm-up time, 0.5oz / yr less than sensitivity, 0~50℃ / 32~122℉ operating temperature, -10~60℃ / 14~140℉ storage temperature, audio and visible leakage alarm indication and low battery indication, adjustable sensitivity and fast warm-up, all refrigerant gas, compact size and light weight, easy to carry.