This is a Roland TR-505 Drum Machine About The Roland TR-505 rhythm composer is a drum machine and MIDI sequencer released by Roland Corporation in 1986. It hails from the same family of drum machines as the Roland TR-909, TR-808, TR-707, TR-626 and TR-606. The drum kit includes basic rock drum sounds similar to those of the TR-707, plus a complement of Latin-style drum sounds similar to those of the TR-727 (the Latin version of the TR-707). Power Requirements: - 9 volt DC power supply - 30mA Current Draw The Condition - This drum machine comes in the condition as shown in the photos. What's Included This drum machine comes with the original box.