Specifications: In-car stereo wireless transmitter: Jh-103 With pll technology and five transmitting points, is specially designed for portable DVD, MP4, car TV, dvb-t, GPS, etc. Being connected with the audio-out jack of above audio devices, the stereo wireless headphone or the in-car FM radio can receive the sound signal from the audio devices. We supply a series of wireless headphone(rf/ir). 1)jh-807sta with stereo manual tuning 2)jh-807a2 with pll technology and LCD frequency display and radio station memory function. You can choose at least 22 frequency points from 88-108mhz and store them according to your need. It is really smart. 3)jh-807stb pll point-to-point transmitting/receiving 4)jh-808sta with manual tuning 5)jh-808stb with pll point-to-point transmitting/receiving 6)ir stereo headphone