Excellent Karaoke SystemPortable Karaoke Machine has a built-in 10w speaker equipped with multi-function functions for full-range stereo sound reproduction, equipped with a powerful audio driver and advanced digital signal processor, intelligently eliminates noise, makes the sound clearer, with stronger bass and moderate volume. 2 Wireless MicrophonesPortable speaker has equipped with two UHF wireless microphones. They use the latest super high frequency technology to ensure stable signals when singing. The microphones are automatically paired with the machine, and the working area can 33 feetTwo microphones only use noise reduction technology, and professional audio processors can set high and low frequencies to ensure sound quality, short press the power button for power on/off, and short press the +- for the Rechargable Battery & Mechanical button design Enjoy non-stop party for up to 4-6 hours with the built-in 2400mAh high-efficiency rechargeable battery.Furthermore, the adopts a simulated keyboard design, which is detachable and easy to wipe the dust off the machine. The buttons are flexible and do not get stuck. Easy to USEOur karaoke speaker is all sat up, easy use as power up with a long press to the power button, then just connected with bluetooth, aux-in, or tf card. It also builts dynamic LED lights for part, which could short press the power button for changing modes, long prese "+" "-" for changing volume and short press for changing songs, >=for start or pause, "mode" for FM or Bluetooth mode. FM ModeDon't you wanna listen to the radio for leisure after job with a hot tea? We built a FM mode in our karaoke machine, you will need to plug in the cable in the DC 5V port, then short press the "mode" to change into the FM mode, then short press ">=" for auto searching radio channel, then it will be saved in the machine, you could listen to them for an another short press the ">=",then change channel by short pressing "+ -" buttons.