Specifications I/O Port:3.5Ø mm Audio Cable Type A Male USB connector Frequency Modulation :88.1 ~ 88.9MHz Channels:88.1,88.3,88.5 & 88.7MHz Operating Range:3(Min)~10(Max)meters Safety:FCC, CE & BSMI Audio Frequency Range:50Hz to 15Khz SNR:>80dB