Why we suggest you to choose this newest UHF wireless microphone headset rather than 2.4 G Mic? Reason 1: The wireless microphone adopts UHF technology supports wall amplification, strong anti-interference, the effect is better than 2.4G wireless Microphone Reason 2: This UHF wireless technology has longer transmission distance and higher reliability than 2.4G wireless technology Reason 3: The UHF wireless technology has a better stability than 2.4G, this means our UHF wireless mic will give you a better experience to enjoy our product. SHIDU 2 IN 1 UHF Microphone works well with: Bluetooth speakers, Voice amplifier, Stereo, DVD Players, VCD players and other 3.5mm and 6.5mm audio jack devices. UHF Wall-through, long Distance Transmittion ( 30m-35m/98ft-115ft ) How to Use? Step1:Plug the receiver into your audio device with Ø3.5- Ø3.5mm or Ø6.5-Ø3.5mm connector (your audio device should have AUX in jack); Step2:Turn on the receiver and Short the button; Step3:Turn on the wireless microphone; Step4:long press the wireless mic "volume +" key for about 5 seconds, then the wireless mic and your audio device are paired successfully automatically. And you could start to enjoy the wireless funny. Specifications: Microphone: Unidirectional condenser microphone Frequency response: 30Hz~23000Hz Output Impedance: ≤2.2KΩ Sensitivity: -41dB±1dB (0dB=1V/Pa) Charging voltage: DC5V 500mA Working time: 3~5 hours Charging time: 2~3 hours Wireless distance:30-35m Package: 1 * Transmitter 1 * Receiver 1 * 3.5mm adapter 1 * 6.5mm adapter 1 * USB cable 1*Munual >Kindly Remind: Please note the 5V charger is not including in the package.