iON Digital Plunger Wireless Door Security Sensor, GE (Plunger-G) by ION Digital

Description

world's smallest concealed burglar alarm contact/transmitter;5 year battery life CR1620 coin cell battery included;works in wood, vinyl, fiberglass and aluminum doors;3/4 in diameter 1 deep with a 7 external antenna;Fully supervised and compatible with GE protocol wireless receivers