HIGH-QUALITY MATERIALS: Made of high-quality PC plastic casing, environmentally friendly, durable and durable. IP55 Sealed Design for anti Rain (FOG), Dust (Worms) and other Integrated climatic conditions, can maintain normal operation in a tough environment. PROFESSIONAL DESIGN: Unique design of the Circuit of Digital Filter with High Capacity anti RFI / EMI. Optical antiinterferencia Housing Professional. Function of frequency adjustment of four channels, suitable for the installation of pile in the same place. SCOPE OF APPLICATION: Widely used for Alarm System, Access Control System, etc. Can be installed in schools, office buildings, hospitals, families, hotels, etc. EASY TO INSTALL: The package includes the transmitter, receiver, screws and circles. Easy to install, the half egg shape can be quickly and easily installed on a wall or door to protect your safety. SWEET TIP: Range can be reduced to 30% in bad weather conditions: fog, rain, dust, etc., Manufacturer: Sonew