... parameter: frequency 315MHz or 433MHz, Transmitting distance >150 m (wide area without interfere) Detecting range: high 2.4m from ground, covered ... than it enters the activate situation. If intruder enter protection area.The detector immediately sends out wireless alarm signal.2. ... by playing pin, simulated as intruder go into the protection area, the LED flashes for about 2 seconds, the detector ...