[Unique HDMI Karaoke Mixing Amplifier]. Stream or play video and music freely, simply connecting this HDMI mixer between RCA and HDMI sources for more impressive features such as connecting headphone to the front panel jack for a quiet listening. Karaoke mixer works fine with 4K/2K scaler and could convert 1080P or lower quality video to an advanced 4K/2K resolution ratio which brings you a total different audio-visual experience. [Bonus Music Volume Adjustment]. Karaoke HDMI mixer support mix audio from 2 different microphones and allow to adjust music volume, echo volume, individual microphone volume. Meanwhile, offering you a superior stereo audio quality. [Intelligent & Moderative Controller]. To make the HDMI mixer works simultaneous with Android TV, Set Top Box, choosing computer to control the selection of songs or other operations, along with streaming or playing the videos or music. Using imported high integration chip, low power consumption, high sensitivity, strong anti-interference. Professional manufacturing, stable characteristics and high reliability. Works with multi-devices such as Android Tv Box, Android Set top Box, DVD Player, HDMI dongle, Laptop, Computer etc. Item Type: Karaoke Sound Mixer Model: KM200 Material: Metal Plug: US Plug Item size:16.110.22.1 cm / 6.344.020.83 in(L W H) Item weight: Approx. 409g /14.43oz Package size:20.214.37.3 cm / 7.955.632.87 in(L W H) Package weight:651.5g /22.98oz. 2 x MIC Line-in 1 x MIC 1 Volume Adjust 1 x MIC 2 Volume Adjust 1 x Main Volume Adjust 1 X Echo Volume Adjust 1 X Earphone Slot. 1 x DC-in 12V 1 x AV In 1 x AV Out 1 x HDMI Output 1 x HDMI Input 2 x Audio Output 2 x Audio Input. 1 Karaoke Mixer 1 HDMI Cable 1 RCA Cable 1 Power Plug 1 User Manual.