Old Blood Noise Endeavors MTET MIDI To Expression Translator; Translates MIDI control change messages to TRS Expression; 4 individual expression outputs; Expression compatibility with any TRS expression enabled device where tip is connected to wiper; LED: EXP 1-4, MIDI In, MIDI Thru, Power; Connections: 2 x Midi to Expression (2 x 1/4" TRS-Jack), 2 x Translator (2 x 1/4" TRS-Jack), MIDI In & Thru; Power Supply connector: Barrel Connector 5.5 x 2.1 mm, center negative; Current Draw: 110 mA; powered by a 9 V DC Power Supply (not included); suitable optional Power Supply: Item no. #409939; Dimensions: (W x D x H): 120 x 66 x 58 mm (4,72" x 2,6" x 2,28"); Weight: 300 g (0,66 lbs); Made in USA; Note: Battery operation is not supported