Cop Security 15-5800VR Wireless Receiver 5.8 GHz 8-Channel Single-Scan Scramble with Power Supply (Beige) 5.8GHz 8CH RX module Built-in Bias-Tee 3.3V/25mA for active antenna connection Omni directional dipole antenna 3dBi Alarm output for siren or flashing (Build-in alarm buzzer) Audio and Video Output