Signstek ST-05B, ST-7C short range fm transmitter can be used for church parking lot. Signstek FM transmitters are FCC certified, FCC ID: 2ASVO05B7CT200. The distortion is less than 0.5%, which can support clear and stable signal transmission. Voltage: 12V DC, Current: <0.5A, Frequency: 76 to 108Mhz, Audio Distortion: 0.3%. With structure design, the external signal will not affect induction frequency of FM transmitter. Signstek FM wireless transmitter is available for drive-in church, church parking lot, drive in movie, factory, supermarkets. 0.5 watt low power fm transmitter frequency can be set within the range 88.1 ~ 107.9MHz.