Info Mini-Piano with 25 Keys velocity sensitive (Natural Touch), 25 Sounds, 50 Demo Songs, Connections: combined Stereo Line-/Headphone-Out 1/8″ TRS Mini Jack (Mono-Playback only), build-in Speaker 8cm, 1 W Amp, Power via 6x AA Battery or optional Power Supply DC 9V, Dimensions: 283 X 258 X 282 mm (WxDxH), Weight: 4.7 kg, colour: black