This listing is for a used LINEP MINI KARAOKE SYSTEM unit x 1 and a power adapter x 1. It connects via RCA terminals and is a 2-channel microphone mixer that easily connects two microphones to home AV equipment and adds echo to the sound. It has two microphone inputs (mono) (MIC-01, MIC-02), allowing for duets. The output is RCA terminals (standard red and white cables). Its compact size allows for karaoke at home or parties with microphone effects. Photo 6 shows an example of use (please note that items not included in the listing are shown). Karaoke using a smartphone karaoke app displayed on a TV screen via the TV's video input terminal (using a smartphone → HDMI adapter and HDMI terminal → RCA terminal converter). I am also listing HDMI to RCA converters and RCA to optical cable converters separately, so please consider them if they suit your needs. If you are interested in this product, I assume you have some knowledge of used items. Please refer to the photos and understand that returns are not accepted. Ships from Tochigi Prefecture. No smoking. There are pets in the household, so please refrain from purchasing if you are sensitive to this. - Model: MINI KARAOKE SYSTEM - Volume Adjustment: Tone, Music Volume, Echo, Microphone Volume adjustment knobs - Input Terminals: MIC-01, MIC-02 microphone input terminals - Power: DC 12V power input - Output Terminals: Red, white, and yellow video and audio output terminals Thank you for viewing.