The image shows a Noyafa NF-604 Halogen Gas Detector designed to identify leaks in refrigeration and air conditioning systems.Key Features: It includes a flexible 25cm probe for accessing tight spaces, a color screen display, and multiple alarm types including visual, audible, and vibration alerts.Detection Range: The device can detect various halogen gases, including CFCs, HFCs, and HCFCs, within a range of 0–1000 PPM.