Outstanding features: A. Stronger anti-error report and much better detecting ability. C. Easy to install, absolutely wireless, power supply built-in, wireless telegraph transmitting signal. D. Save power design& high capacity, it lasts longer than other wireless infrared detector. E. Extending socket built-in, compatible with wireless multi-host. Power supply: 1.5V high alkaline battery. 2500mAH Working current: static < 30uA; alarm < 20 Ma Self-check: 1~2 minutes Wireless parameter: frequency 315MHz, Transmitting distance >150 m (wide area without interfere) KM-2000 communication mode. Working mode: power save mode (twice alarm minimum alternation time is about seven minute); Test mode: (twice alarm minimum alternation time is 20 second). Sensor: Special made low noise double configuration. Sensitive indicator: When detect people body go through the curtain defense area, the red LED turns on for 1.5 second and transmit the signal. Lens window: 31 pcs Sensitivity: Jump line adjusted: (4~8 m, 6~10 m, 9~12m)