Wireless microphone headset system: Only for Mic Jack, not Aux Jack, otherwise no sound âBuilt-in high sensitivity condenser microphone, transmission distance upgrade to 160 Feet (50m) âSignal StabilityâNo DelayâNo Radiation âAnti-Howling âAnti-Jamming âConstant Frequency âClearer Sound Quality. Compatible voice amplifiers, multimedia. It is a portable Karaoke equipment.(Excludes Amp⫬ supported bluetooth speaker, PC and Laptop) âObtained by FCC test.Easy to use: Please turn on the transmitter and receiver power switches, the blue light will flash for approximately 2s. Indicator light stops flashing after a successful match, then you can use it. No further operation. âHeadset and handheld is 2 in 1 design, easily change the handheld mode to headset mode to meet your needs. Not supported Phones, Macbooks, Laptop, Bluetooth Speaker.Charge and work of wireless microphones: The transmitter and receiver are built-in 400 mah rechargeable lithium-ion batteries that can offer about 6 hours working time. âUsb cable has two micro USB V2.0 to charge for the transmitter and receiver simultaneously. Fully charge is only 2.5 hours. âPerfect Application: The plug on the receiver is 3.5mm. For 6.35mm amplifiers, please use the additional 6.35mm adapter(included)to connect more equipments.Using multiple wireless microphone simultaneously: Please refer to the user manual to channel switching( Max 15 Channel ) in (âPart 4 Advanced Operations To 4.2 Note B, Page 8) Otherwise there maybe noise or no sound. Use up to 15 microphone headset at the same time. Built-in cardioid polar pattern condenser microphone, widely applied to conference, speech, Web podcast, outdoor Live, Yoga instructor, voice amplifier, dancing instructor, promotion, game etc.What if can't pair or no sound: â1, Turn off the receiver and transmitter â 2, Turn on the transmitter(Handheld Microphone), blue light is on, long press "+ " to flash the blue light â3, Turn on the receiver and wait for connection â4, The blue lights of the transmitter and receiver stop flashing, the connection is successful.ABS