Door/window sensors

Wireless door/window sensor with built-in antenna and DIP-switch

Wireless Door Sensor for Security System/Home Alarms, Built-in Backup Battery

Wareless Door and Window Sensor for Smart Home System, Lightweight

Magnet Transmitter with Magnetic Switch to Detect Opening of Doors or Windows

Magnet Transmitter with Magnetic Switch to Detect Opening of Doors or Windows for Smart Home System

Home DIY Door/Window Magnetic Sensor Alarm, Fixing Code, Encode Chip 2262

Wholesale Wireless Solar Door GSM Home Alarm, 433MHz/315MHz for Optional, Built-in Backup Battery

Wholesale Magnetic Sensor Alarm Door Window Security System with 433/315MHz for optional

Wholesale Wireless Solar Door With LED Indicator, Low-battery Display Green Color