1500mw wireless video/audio transmitter system. Transmission frequency:1500mW. Working Frequency arrange: 1.5G Channel choice: four channels, synchronization of audio and video. Transmit distance: (No obstacle) 1000-4000M. Working Volt: transmitter DC 12V Working Current:400mA Included sets:12 channels receiver, transmitter, two small antennas, transmitter connecting lines, vedio /audo connection lines. Color: blue working temperature: -10° ~ +50° Transmitter size: 70*41*14 mm receiver size: 115*60*21 Transmitter weight: 112g