this is a 2.4ghz wireless av transmitter and receiver, adopt an advanced microwave and wireless transfer technology develop and maufactory by lenkeng technology, this device allows transfer video and audio hi-fi signal. allows you watch existing video signal, such as dvd, satellite from any t in your house or office. you attached a small transmitter to the original peice of equipment, them attach a ereceiver to another tv to watch exactly the same programme. there is no need tfor any addition wires, and you can even use the original remote control. the visual range up to 200m. 20-100m when have roadblock, effective distance is more than 5 times better than other rivals in the market. support output signal from dvd,vcd, cd, tv, vcr, vtr etc. suitable for use in hospital, school, shops, offices, warehouse and family etc. this equipment work with: ? tv ? vcr / dvd ? satrllite system ? cable set-top boxes ? freeview digital set-top boxes ? audio music centre / system ? your pc to your ytv we only sell the best not the cheapest copy. product features: - 4 selectable channel - compatible with both pal and ntsc tv system - includes 2 universal ac power supply (100-240v) - metal construction with metallic finished surface - operation frequency: 2.4ghz - effective range: up to 200 meters - signals transmitted: video and audio (l & r channel) - audio modulation: fm - input: rca jack for video and audio (l & r channel) - output: rca jack for video and audio (l & r channel) - power transmitter and receiver: 9-12v - dimensions: 10cm x 6cm x 3cm (l x w x h) - box contents: 1 x 2.4ghz transmitter 1 x 2.4ghz receiver 2 x ac-dc power adapter 1 x user manual shenzhen lenkeng technology co., ltd has hi-technology on video converter and self r&d ability. sony company, shanda interactive entertainment limited (nasdaq: snda), china hebei netcom company. china netcome company, shenzhen subway engineering etc famouse company order video converter from us for we have quality and price comeptition. catherine4531 at hotmail.com skype:catherine4531 qq:446310068 86-755-82501733