New in bulk packing The item may be slight scratches on the surface due to transportation and storage, please understand Try to avoid pointing the radar antenna directly towards large metal equipment, rotating fans or pipes, etc. When placing multiple radar alarms, efforts should be made to ensure that the antennas of each radar module are parallel to each other, avoiding direct illumination between antennas, and maintaining a distance of at least 1m between modules. Radar sensing device, suitable for outdoor use. The receiver can connect 10 radars and communicate with them at a distance of 50-100 meters. Adjustable alarm mode, vibration, buzzing, etc. IPX7 waterproof, long endurance, and more durable. Professional anti-theft equipment must be installed by professionals to ensure daily maintenance and repair. Parameters: Product size: 4 4 7cm Working voltage: 3.7v Radar frequency: 5.8GHz Wireless distance: 50-100m (open) Include As Option Shown