FETTER'S TR503 FM Transmitter Wireless Headset FM Transmitter with multiple inputs is a great solution for sending wireless audio to any BM receiver Davies including car radios; Onrush FM transmitter for any seventeen, curbside apple or delves sophistication bleeding churches, gradations, weddings snd more ~-Product overview and features Specification Frequency range Output Power ‘Working Distance Power Supply Working Time Charging Time Weight Size L10mW 30m 450m Ah lithium battery 8 hours 2-3 hours 50g 200