SODIAL(R) 433MHZ Wireless Door Window Magnet Sensor Detector Alarm Home Security System Power Requirements: DC=12V-8.4V (23A DC=12V battery inside) Current Consumption: less than 20uA;less than 15mA while transmitting Transmit Frequency: 4330.2Mhz Transmit Duration: less than 1s Transmit Distance from host: more than 80m (no obstacle)