Signstek ST-05B Dual Mode Long Range Stereo Broadcast Home FM Transmitter with Antenna Black ( brand new in box ) Feature: The Signstek 0.5W Long Range Dual Mode Stereo Broadcast FM Transmitter broadcasts in both High and Low Power Output Modes It is available for use in factories, schools, supermarkets, farms, office space or creating your own radio station,etc The FM Transmitter will not drift between stations because of our advanced stereo PLL Digital Tuner Technology, and which is designed to operate non-stop 24/7 The product crust is made of high-quality aluminum, which also is the heating panel of power amplifier RD06HVF1, with blue back-light LCD to display five digits of frequency The motherboard is applied with chip BH1415F, which is the new-generation integrated NC FM stereo radio chip by ROHM, built-in PLL frequency, audio pre-emphasis, limiter and low pass filter circuit. Make sound more sweet With a high gain antenna ,it can easy broadcast anywhere you want, home , apartment ,church ,school , club, camping , backyard , resident village. Specification Working voltage:12V DC Frequency domain:88.1 ~ 107.9MHz Frequency stability:10PPM stepped frequency:100KHZ The operating temperature of the environment:-10?~45? Output impedance:50? Harmonic and noise radiation:??60dB Audio distortion:0.3% Frequency response:88.1~107.9MHz Degree of separation:?35 dB Antenna Type:TNC Input level:?15 dB Modulation frequency deviation:75KHZ Input connectors: 3.5mm Mini phone SNR(Signal to Noise Ratio):?60 dB Size:113x88x39mm Weight :269g Package 1xSignstek 05BFM Transmitter 1xAdapter 1xCable 1x 3.5mm Audio Cable Well-shielded, compact structure, small size, generous appearance, plug and play, very easy to use. FCC certified. FCC ID: 2ASVO05B7CT200 Equipment using advanced modulation system and built-in PLL frequency, audio pre-emphasis, limiter, and low-pass filter circuit. Control circuit board design and amplifier design to reduce noise, so sound quality is even better The FM Transmitter uses the control panel buttons to control the frequency to avoid any needs to reset the FM Transmitter Transmission distance more than 300 meters (In the line of sight, field, open land)