The Sound Town SWM16-KM is a compact wireless microphone and karaoke mixer system. It comes with dual-channel, 8 selectable UHF frequencies per channel (16 channels in total) and is interference free. The receiver has one 3.5mm (1/8") TRS input, one 3.5mm and 6.35mm (1/4") TRS output connectors, plus built-in Bluetooth for easy setup with your home theater or speaker system. It works with a wide range of devices including phones, tablets, PCs, laptops, home receivers, speakers and etc.The microphone receiver and sound mixer enable you to mix mic signal with music without using an additional mixer. It comes with two wireless microphones and can support two wired dynamic microphones (not included). The rotatory control knobs can swiftly adjust the volume of your music, microphone, echo and tone to the desired level. The built-in pop filter reduces potential popping sound and helps deliver consistent and superb sound quality. It’s ideal for karaoke, house parties, conferences, broadcasting, weddings, social events and any small to medium-sized venues such as meeting rooms, auditoriums, schools, churches and stages.Setup Requirement The wireless microphone system needs to be connected to a powered speaker (with 1/4" or XLR inputs) or an amplifier to work. These devices are sold separately.