Specification brand name retekesmodel ft11frequency range 76 108mhzpre emphasis 50us 75usoutput impedance 50 snr signal to noise ratio 70dbfrequency response 30hz 15000hzrf output power 1mw 300mw 3 levelssupported audio formats flac wav wma mp3memory card support max 32gbpower supply built in 1500mah li poly batteryworking hours about 6 8 hourscharging method dc 5v 1a micro usb jacksize 99 x 58 x 15mm 3 9 x 2 2 x 0 6 inweight 80g 0 17lbfeatures 1 wide fm frequency range adjustable transmitter frequency from 76 108mhz for flexible broadcasting 2 preset stations allows you to save and quickly access 5 preset stations with manual or automatic search 3 dual microphone input modes includes built in microphone for mobility and external microphone for hands free usage 4 auxtf card support easily share content from your phone or tf card through the aux cable or tf card slot 5 long battery life equipped with a 1500mah battery that delivers 6 8 hours of continuous use ideal for long conference 6 compact and lightweight design easy to carry and handle with the small size and light weight package includes 1 x ft11 transmitter1 x antenna1 x usb charging cable1 x wired microphone1 x hand strip1 x english manual Brand: Retekess