Latest wireless karaoke microphone system Built in high sensitivity professional Dynamic microphone transmission distance upgrade to 160feet 50M Signal stability No delay No radiation Anti howling Anti jamming Constant frequency Distortion 0 2 15 UHF Adjustable channels The mic outer case is alloy material which is harder lighter and more wear resistant Not compatible Bluetooth speakers Can Only Plug in mic jack no plug in Aux jack otherwise no sound can be heard Easy to use microphone Plug and play no need pair 6 3 mm 1 4 to 3 5 mm 1 8 adapter for with MIC jack speaker Singing machine audio amplifier PA system Voice amplifier and more Streaming multimedia equipment only plug in MIC jack Forbid Plug in AUX jack Not supported MacBooks If you need to use multiple wireless microphones at the same time press the channel button to switch channels 15 channel numbers Not the same Battery and display The microphone does not come with any batteries we recommend using 2 AA Amazon alkaline batteries The chargeable receiver is built in 720mAh battery for 4 5 hours use time and fully charged in 3 hours The display can show the battery power and signal strength in real time don t worry about Suddenly not working Professional dual channel dynamic microphone Built in moving coil microphone widely applied to conference speech Web podcast YouTube recording Outdoor recording Yoga instructor church get together Family party Opening Ceremony dancing instructor Promotion game etc If you use multiple microphones at the same time Please switch channels Part 4 Advanced Operations to 2 note B Page 8 otherwise there maybe noise or no sound Advanced connection and after sales If your microphone has no sound make sure you have enough power for the microphone and receiver Insert the MIC jack Not an AUX jack We offers1year warranty and free replacement service Can write to us when you have any questions We will be the greatest brand in the United States Not supported Bluetooth speaker and MacBooks