Mambate 2 pack PERIPHERAL NightVision OUTDOOR 4-Channel WIRELESS 330ft Night Vision CMOS CAMERA (2) W/RECEIVER & REMOTE control Channel-scan for multi-camera monitoring; Night vision (Effective range: 7m) Transmission Frequency ISM 2,400~2,483 MHz; Operating Frequency 2414MHz;2432MHz;2450MHz;2468MHz ;Unobstructed Effective Range 100m(Min.) Imaging Sensor Type CMOS ;Picture Total Pixels PAL:628?582 Pixels;NTSC: 510?492 Pixels ;Horizontal Resolution 380 TV Lines Receiver:Antenna 50 ohm SMA; Intermediate Frequency 480MHz ;Video Output Signal Level 1.1Vpp?0.2Vpp@75 ohm Alloyed shell, Weather-proof structure for outdoor installation; Built-in microphone for audio monitoring