Korg RK-100S 2 Red, Compact Keytar, 37 Mini velocity sensitive keys, 2 Ribbon controllers, Sound generation: MMT, Polyphony: max. 8 voices (max. 4 voices if the vocoder is selected), 200 Preset sounds, Max. 2 timbres (when using layer, split or multi), 8 Favorite buttons, Performance features, Integrated arpeggiator, 16-Band vocoder, 2 Oscillators + noise generator, Multimode filter, 2-Band EQ, Master effects: 17 effect algorithms, Battery operation (6x AA batteries), LED display, Lacquered wooden body with clear wood grain, Microphone / line input: 3.5 mm mini jack, Stereo headphone output: 6.3 mm jack, MIDI output, USB, Connection for external 9V power supply, Dimensions (W x H x D): 838 x 72 x 263 x mm, Weight: 3.15 kg (weighed with batteries), Colour: Red / transparent, Includes shoulder strap, soft case and 6 AA alkaline batteries (for verifying operation)