Interlogix TX-E221 Recessed Door/Window Sensor

Interlogix TX-E221 Recessed Door/Window Sensor Recessed Door/Window Sensor, 319.5MHz. The TX-E221 Recessed Door/Window Sensor from Interlogix is compact and strong for dependable operation. Hidden throughout the door frame, this contact is just about invisible when the door is closed making it ideal when discreet sensors are wanted. The TX-E221 Recessed Door/Window Sensor uses a replaceable lithium battery that lasts as much as five years under normal usage and is derived with a normal flanged most sensible. Field proven wireless technology Compact design Simple replaceable battery Wide gap as much as 1″ maximum Replaceable battery with as much as 5 years of battery life(in line with usage)

Interlogix CA-TXE221 Recessed Door/Window Sensor, 319.5MHz