Blackstone Labs HALO ELITE. Karaoke Mixing Amplifier with Bluetooth Optical HDMI. (BRAND NEW IN RETAIL BOX). 90dB Voltage: AC 115V – 230V Manual Select Microphone: Connector: 1/4 TRS/Unbalanced Input Impedance: 1.5K? Input Sensitivity: 10mV T. Package Includes: Amplifier IP-5900 Full Functions Remote Control Operating Manual Book Power Cord. We will try best to solve your issue.