KORG KR mini Rhythm Machine This is for the unit only. There is a manual. There is no box. Batteries are installed and it is working properly. (3 AA batteries) You can see the power lamp is lit in the 6th photo. There are markings written with a marker around the Tempo knob. (Photo 8) Please use it for setting the Tempo. Please hold down the button for a longer time when turning off the power. 【Compact Design】 KORG's KR mini is a compact size that is convenient to carry around, so you can enjoy rhythms anywhere. 【Various Rhythm Patterns】 Various genre rhythm patterns are built-in, supporting creative music production. 【Easy Operation】 With an intuitive button layout and control knobs, even beginners can easily operate it and start making music right away. - Brand: KORG - Model Name: KR mini - Color: Gray - Control Knobs: Yellow, White - Functions: Rhythm pattern selection, volume adjustment - Input/Output Terminals: Headphone jack, DC jack - Control Knobs: Level, Input Thank you for considering purchasing.