• INTERFERENCE FREE: the wireless microphone system comes with Ultra-High Frequency (UHF, 550-590 MHz) which is less likely subject to interference from other equipment compared with a VHF system. It has 16 selectable frequencies (8 frequencies each channel) and is compliant with the latest FCC regulations
• TWO IN ONE: the wireless microphone receiver is also a sound mixer and equipped with rotatory controls which allow you to adjust echo, tone and volume of the mics
• EASY TO SET UP: the receiver has one 3.5mm (1/8) TRS input, one 3.5mm and 6.35mm (1/4) TRS output connectors 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.
• SUPERB QUALITY: the built-in pop filter reduces potential popping sound and helps deliver consistent and superb sound quality. Its ideal for conferences, broadcasting, weddings, karaoke, social events and any small to medium-sized venues such as meeting rooms, auditoriums, schools, churches and stages
• BUILT-IN BLUETOOTH: The built-in Bluetooth allows you to wirelessly pair from the music source device for optimal sound performance and coverage; Bluetooth 5.0 ensures immediate pairing and maintains a strong connection up to 100 feet

Looks and appears new, unused, and in excellent condition. Has been powered on with no further testing.