FMUER 1W FM Radio Transmitter, 0-1w RF Power Adjustable PLL Stereo FM Broadcast Complete Set, Long Range Transmission with Antenna, Bluetooth Audio Input TF Card Play for Conference/World Cup Match &gt;Long Range: This 1 watt FM transmitter is able to cover 0.6 miles in open land. &gt;Wide applications: FMUSER 1w fm transmitter is oftenly used for drive-in theater, conference audio tranmission, simultaneous interpretation, christian church audio broadcasting &gt;Various audio input: 1w radio broadcaster supports Bluetooth audio input, TF card MP3 play, 3.5mm Line-in, basically any audio source used in your daily life. &gt;Long batter life: The transmitter includes 300mAh rechargeable battery, works about 4 hours even if the electricity is off. &gt;Easy to use: This product is a Complete package, plug and play design enables you to broadcasat ON AIR in 5 mins! Supermarkets: Motels/Outdoor Advertising: Conferences: Factory: Church: Concerts/Cinemas: Campus Tourism