Description : 1. SensorDouble frequency (original import) and low voice instruction. 2. Detecting range: Farthest 9m (set can recognize direction), farthest 12m ((set doesnt recognize direction) function. 3. Detecting angle: Vertical 110?Horizontal 60?4. Transmission frequency:433MHz?.5 MHz 5. Sending distance: No obstacle 80m 6. static current: d50uA 7. Alarm currentd40mA 8. Work condition: temperature -10^40 9. Humidity d90 10. Battery type: Size 5, section 2 11. Batter life :6 months