... DVR 4.Long distance:2k-3k 5.Low price Watt fm transmitter*4 channels available to avoid interference*Transmission distance:5000m in ... open place*Transmission frequency range: 2314-2468MHz*Suitable for any camera and any digital video recorder*Easy play on ... demand in our factory ) , it could charge laptop , camcorder, mobile phone, iPOD, iPhone, PSP, PMP, MP3, MP4,DVR, portable DVD, pocket ...