[Professional UHF Wireless Karaoke Microphone System]: The microphone connection distance is about 160feet (50M). Bluetooth 4.2 connection distance is 10M. ●Signal stability●No delay●Anti-howling ●Anti-jamming ●Constant frequency ●Clearer sound quality. ●Frequency Response 50Hz-18kHz; SNR >95dB; Distortion <1%; 15 UHF Work channels(CH01-CH15). | [Wireless Microphone System With Treble/Bass/Echo] : The karaoke microphone set has treble, bass, Echo control button, so you can choose different sound effects according to different songs. This wireless microphone system has Bluetooth function, connect via Bluetooth( Bietrun 08) to play your favorite music.This wireless microphone has 30 channels, each 15, you can switch to the channel that do not have interference. Perfect for Karaoke, Speech, Meeting, Conference, Indoor or Outdoor. | [Very Easy to Use]: Plug and play, no extra setting. Comes with two handheld wireless karaoke microphone, you can do all you want on the microphone and see clearer from the large led display. The Wireless Microphone Receiver has a UL-certified plug, very safe, Or use power Bank (5V-1A) supply Power. Each microphone ues 2 AA batteries (not included), Please using Amazon alkaline AA batteries for longer karaoke time. | [Multi-function Wireless Microphone]: It has Multiple cables of different specifications to Connect multiple media devices in the package set.E.g: iPhone, TV boxes, PC, amplifiers, speakers, multi-media equipment, laptop, Guitar speaker etc. for karaoke, family parties, singing, youtube, live, Tiktok, speech contest, conference, church, wedding host, Car audio system, Dome room audio system, etc. | [Packing list and 1-year warranty]: Bietrun offers 1-year warranty and free replacement service, If you have any question, please contact us anytime. Packing list: 2*RCA cable, 1*3.5 mm cable, 1*6.5 mm cable,1*UL certification Adapter, 1*receiver, 2* microphone, 1*USB cable.