Frequency Response: Transmission frequency can be set from within the range of 87 ~ 108MHz 15W high-low power-adjustable, the transmission distance of 3-4 km (1.9-2.5 mi) in the open air.FCC certified. FCC ID: 2AQIX-T15B | Channel switching: switchable stereo, mono Designed with advanced modulation system and built-in PLL frequency, audio pre-emphasis, limiter, and low-pass filter circuit. | High-fidelity Wireless: you can connect wirelessly to mobile phones, tablets and other Wireless devices Good heat dissipation: using high-quality dual ball bearing fan, reasonable heat dissipation channels, excellent thermal performance. | PC control: connect your computer via micro USB interface, plus supporting intelligent broadcasting software, to achieve diversification unattended broadcast. (time switch, time to play the specified music, etc) 1/4 wavelength of strong magnetic sucker antenna, can be tightly adsorbed on the car roof or any metal flat objects, easy to move the antenna to the outside, the roof, balcony or window, more effective transmission and reception of electron. | Excellent Heat Dissipation: Aluminum alloy metal shell, good cooling effect, quiet fan With PC control, Intelligent Broadcast.