HDMI Karaoke Sound Mixer with 2PCS Wireless Microphone Support BluetoothV5.0 Karaoke Mixer System with HDMI Optical Toslink AUX Out. HDMI Karaoke Sound Mixer. Squelch sensitivity: 6dBμ(-101dBm). With two high-quality wireless microphones make you don't need to worry about cutting in and out of sound during use.
eBay