Wildly application?This 0.1/0.5W FM transmitter is very suitable for broadcasting music, audio or voice to any FM receiver within a certain distance through the FM frequency band. This low power transmitter can also be used in outdoor car theaters, churches, parks, schools, factories, hotels,christmas lights show,home,parking lot. Small but more powerful than expected?The build of the transmitters is small but sturdy,You can conveniently create a FM broadcast station system via mobile phone,Laptop, PC, MP3/MP4, TV ,external microphone and so on.You will be pleasantly surprised to find that it was surprisingly powerful to reach a city block with a clear line of sight and about half that distance when going through concrete walls. High quality transmission?This am mini stereo broadcasting equipment will transmit clean and strong with no annoying static or drifting.If you want to go the distance and get the most you will be better off with a well thought out broadcast location(preferably high on the roof or on a hill). Long range coverage?The broadcast transmitter can easily push a clear signal up to 1,000 feet away, which is much larger than the church campus. In the absence of obstacles, FM signals can travel further. FCC ID ?This fm transmitter complies with US FCC part 15 certification (FCC ID: 2ASVO05B-73).