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. ★Wireless Microphone With 6.3 mm(1/4'') to 3.5 mm(1/8'') TRS converter and 6.3 mm(1/4'') to 3.5 mm(1/8'') TRRS Conversion cable, for with MIC jack speaker, Singing machine, audio amplifier, PA system, Voice amplifier and more Streaming multimedia equipment, only plug in MIC jack. Use TRRS cable to connect PC/Apple iPhone/Android phone Laptops etc. ★Forbid Plug in AUX jack. ★Not supported MacBooks. | 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.