BOSCH, Radion Series, Wireless reed switch, For doors/windows/dry contact devices, Integrated magnetic reed switch, Supervised sensor loop, Suits RFRC-STR2, RF3212E, B810 & RF120 receivers, 433MHz

Single alarm loop input can be configured for use with virtually any Normally Open or Normally Closed external detector. Integrated magnetic reed switch contact. Up to 5yrs operation via 1x user replaceable CR123A Lithium battery.