NEW: battery-powered, combined PIR and micro-wave technology, 12m wide twin sensor external detector with anti-masking.The combination of passive-infrared and micro-wave technology gives an ultimate stability in more challenging enviroment where the detector will be exposed to strong sun light or light from the traffic. Features With the VXI-RDAM, you can add the wireless transmitter of your choice. A couple ofwireless transmitters can be purchased directly from OPTEX. Active IR Anti-mask technology PIR/MW detection technology MW range control Sway analysis 12m wide angle twin sensor PIR device. (Anti-mask upgrade to VX-402Ri) Advance SMDA target recognition detection circuit 5x Adjustable detection ranges 5x Detection pattern options (5 pre-cut masking seals included) small animal tolerance function 90º detection pattern, rotatable through 180º IP55 weather protection Multi tamper protection Signaling, Alarm, Masking, Tamper, Low battery, Wireless failure