????Rechargeable Dual Microphones: Handheld wireless microphones & receiver are rechargeable,no need to change the battery frequently.The battery of mic can last for about 8 hrs, the receiver's battery can last for 4 hrs. It also owns a power saving technology.,save your energy! ????Clearer Sound Quality : The sound can be heard clearly through this dynamic microphone without any noise.A good choice for Karaoke, Home KTV, Big party, DJ, Wedding, Church Class,etc ???? Durable and Portable:The K380S wireless microphones adopts metal aluminum tube, and the net head is made of metal baking varnish, which is safe, fall-proof and durable.The receiving box is directly plugged into the stereo and it is portable. ???? UHF Wireless Mic:Adopts UHF wireless ID pairing technology,supporting 10 channels,channel is variable ,avoiding interference signals at any time. The international standard working distance is 15 meters (measured 30 meters). ???? Advanced Technology : Microphone & Receiver use UHF Connection Technology, Indoor range >50ft(Outdoor range >100ft); Frequency Response 50Hz-18kHz; SNR >70dB; Distortion <0.5%; Latency <3ms; 10 UHF Work channels(CH01-CH10).