1. Alert state can be set/reset by a wireless romet controller;
2. Power input: solar energy;
3. Protection range : 5-100m(outdoor)
4. No cable wire, no need to change batteries, no maintenance, easy to install or remove, suitabel for temorary;
5. Digital process, beep sound to confirm proper alignment;
6. Immunity to infrared interference from sunlight and other light sources;
7. Two synchronized beams of pulsed infrared energy;
8. There are 10m, 20m,40m, 60m, 100m for option.