? Mini Wireless FM Transmiter Receiver Clip-on Microphone with Cordless Headset Mic system? Just connect the receiver to any amplifier and you can communicate wirelessly up to 20 m? Clip-on Lapel Microphone or cordless headset mic both can free your hands when you speaking? Modulation: FM; Transmit/Receive? Perfect for meetings， speeches， conference，karaoke， church etc.Features: ? 100% Brand New and High Quality ? With compact portable design ? Enjoy the freedom of wireless speaking ? This system is perfect for meetings， speeches， conference，karaoke， church etc. ? Included two kinds of Microphone (a Headworn Microphone and a clip-on Lapel Microphone) for your random selection Specification: 1. Frequency response: 80~12.5KHz 2. Output impedance: 600 omega 3. Sensitivity: -52dB 4. Degree of distortion: less than 0.5% 5. Effective distance: 15m and more 6. Direction: Unidirectional 7. Receiver 6.3mm Jack plug 8. Transmit/receiving frequency: 114MHz-116MHz 9. Transmitter Power:1 x 6F22 9V battery (included) 10. Receiver power:1 x AAA 1.5V battery ( included) 11. Transmitter Size: 95mm x 63mm x 22mm/3.74 x 2.48 x 0.87"(LxWxH) 12. Receiver Size: 72mm x 44mm x 14mm/2.83 x 1.73 x 0.55"(LxWxH) Package includes: 1 X Clip-on Lapel Microphone 1 X Headworn Microphone 1 X Transmitter 1 X Receiver 1 X 6F22 9V battery 1 X AAA 1.5V battery 1 X User Manual