Specification 1.transmitting frequency:88.1MHZ.88.3MHZ.88.5MHZ.88.7MHZ; 2.moduale method:FM 3.earphone socket:3.5mm(d) 4.Frequency tolerance:?00HZ 5.Transmitting power:200?0μw 6.Transmitting distance:8m 7.Voltage:3V AAA* 8.Electric current:70?0mA 9.Dimision:84*43*24(mm)