Main Features:¡ñ Just connect the receiver to any amplifier and you can communicate wirelessly up to 20m¡ñ Clip-on microphone or cordless headset mic both can free your hands when you speaking¡ñ Modulation: FM Transmitter / Receiver¡ñ Perfect for meetings、 speeches、 conference、 karaoke、 church etc.¡ñ Compact portable design、 enjoy the freedom of wireless speaking¡ñ Including two kinds of microphone (a head-worn microphone and a clip-on microphone) for your random selection ¡ñ Transmitter power: 1 x 6F22 9V battery ( included ) ¡ñ Receiver power: 1 x AAA 1.5V battery ( included ) Type: WirelessConnection: 3.5mmFrequency Range : 80 - 12.5KHz Sensitivity Range: -52dBPackage weight: 0.381 kgPackage size (L x W x H): 26.000 x 17.000 x 7.000 cm / 10.236 x 6.693 x 2.756 inchesPackage Contents: 1 x Headset Microphone、 1 x Clip-on Microphone、 1 x Wireless Transmitter、 1 x Wireless Receiver、 1 x 1.5V AAA Battery、 1 x 6F22 9V Battery