Mandarin Electron ME04ET_BB Matryomin Theremin Produced by Japanese Theremin pioneer Masami Takeuchi in 2003. Over 5,000 lovers so far in the world. Warm tone, wide range (over 5oct.), good octave distance like as serious Theremin. Watch videos. Pitch control only, no volume control. Powered by 4 "AA" alkaline batteries (no including). Mono phonic. Phones and line output. No midi, No CV output. Please note, matryoshka has individual differences in shape and painting. Because it made by hand. Watch videos.