Home burglar alarm door magnetic switch used for shutter door, metal door

Main Feature
Power Requirements: DC 12V (23A DC=12V battery inside)
Working current: ≤ 10mA
Quiescent Current: ≤ 3uA
Transmit Freqency: 315MHz
Transmit Distance from host: 500m (in the open area)
Work distance: 1.5m/ 3.3m/ 4.7m optional