The Rockville RKI65BT Dual UHF Wireless Microphones+Bluetooth Karaoke Mic Interface is a versatile karaoke mixer with digital echo and Bluetooth capabilities. It features dual UHF wireless microphones and digital audio input/output ports via Digital Audio Optical TOSLINK. The sleek black design and user-friendly features make it an ideal choice for karaoke entertainment setups. Made by Rockville, a trusted brand in musical instruments and gear, this karaoke mixer offers quality performance and functionality for an enhanced karaoke experience.