GQ-ZT401, Wireless Video Transmitter, single channel.It is of high quality. GQ-ZT401, Wireless Video Transmitter, single channel.It is of high quality.Features:1) Frequency: ISM 2,400 ~ 2,483 4CH2) Transmission power: 10mW / CE, 2mW / FCC3) Bandwidth: 18MHz4) Unobstructed effective range: 100 (Min) align=baselineborder=0>