?What you get?4-channal metal UHF Receiver,4 wireless microphone , 1 power adapter, 1/4" audio cable, 4 Antenna,4 color anti-rolling rings,8 AA batteries,12-months warranty. ?Wide using occasion?Professional receiver has XLR mixed output,4 independent 6.35mm(1/4") output jack, easy to connect to amplifier/speaker.It's a perfect choice for event like party wedding singing karaoke and outdoor activities. ?Easy set up and operate?The preset fixed frequency receiver and 4 mics have one-to-one correspondence frequency will match automatically.The UHF reciever has 4 individual volume control for independent vocal control.The LED display screen and signal indicator show you working condition of each microphone. ?Fixed Frequency Design?4 channel UHF fixed frequency design, corresponding to 541.25MHz, 547.25MHz, 571.50MHz and 577.75MHz to ensure the superb stability of the signal while eliminating all sound distortion and interference. Using range up to 260ft. ?Durable Quality?Wireless receiver and cordless microphones with rugged all-metal build construction. High sensitivity unidirectional handheld microphone design with high quality dynamic cardioid pickup cartridge is build to pick up clear sound and reduce unwanted feedback and interference.Clear robust sound transmission base on Technological Core.