RADION wireless security solution from Bosch provides the range, scalability and exceptional battery life required to ensure reliable performance and superior quality. Advanced diagnostics and multiple device enrollment options make installation and maintenance simple and cost effective. With a complete line of peripherals, RADION provides the flexibility for virtually any application requirement. RADION contact SM provides a magnetic reed switch contact for monitoring doors and windows. The internal reed contact is activated by an external magnet assembly which can be placed on either side of the transmitter. It also has a built-in wall and cover tamper switch that transmits a tamper signal when someone removes the device from its base or pulls away from the wall.