What's in the box:

KM200 Karaoke Sound Mixer Portable Digital Stereo Audio Echo System 4K/2K HDMI Karaoke Amplifier with Dual Microphone EU Plug (Black)

Features:
[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.
[Fantastic Audio-visual Enjoyment]
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 HDMImixer support mix audio from 2 different microphones and allow to adjust music volume, echovolume, individual microphone volume. Meanwhile, offeringyou a superior stereo audio quality.
[Intelligent & Moderative Controller]
To make the HDMImixer 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.
[Built-in High Integration Chip]
Using imported high integration chip, low power consumption, high sensitivity, strong anti-interference.Professional manufacturing, stable characteristics and high reliability.
[Compatible with Multi-devices]
Works with multi-devices such as Android Tv Box, Android Set top Box, DVD Player, HDMI dongle, Laptop, Computer etc.

Specification:
Item Type: Karaoke Sound Mixer
Model: KM200
Material: Metal
Color: black
Optional Plug: EU Plug, US Plug(Optional)
Item size:16.1*10.2*2.1cm / 6.34*4.02*0.83in(L * W * H)
Item weight: Approx.409g /14.43oz
Package size:20.2*14.3*7.3cm / 7.95*5.63*2.87in(L * W * H)
Package weight:651.5g /22.98oz

Front Panel:
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

Back Panel:
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

Packing List:
1 *Karaoke Mixer
1 *HDMI Cable
1 *RCA Cable
1 *Power Plug
1 *User Manual