Wireless Magnetic door/window sensor for IWATCHALARM (Add-on) Key Specifications: Battery Powered: DC 1.5V (1X AA battery, last up to 1 year), LEDs: Red, Transmission Frequency: 433 mHz, Transmission Distance: 490 feet clear line of sight no walls.
• Add-on magnetic door/window sensor for IWATCHALARM series. Works with the host of any IWATCHALARM system. Magnetic contact sensor for doors & windows. 1 red LED indicator lights when door/window is open. Transmits at 433MHz wireless frequency with a distance up to 200ft indoors & 450ft with a clear line of sight