【Adjustable frequency】: Machine coverage frequency is FM full range 76-108MHz. Effortlessly avoid local radios and enjoy Hi-Fi stereo, the transmission distance of 3-4 km 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-accent, limiter and low-pass filter circuit. | 【Heat Dissipation】: Using high-quality double ball fan, , Intelligent wind speed control, a reasonable cooling channel, first-class thermal performance. | 【Bluetooth & PC control】Hi-Fi Bluetooth input, connect your computer via micro USB interface, plus supporting intelligent broadcasting software, to achieve diversification unattended broadcast. | 【Fashion appearance】: All aluminum alloy shell, heat-resistant high-quality, corrosion-resistant; panel using drawing technology, exquisite beauty, buttons with convex cylindrical design, feel comfortable.