The SDS-3 was the precursor to Simmons’ SDS-V, the pioneering and hexagonal electronic drum kit beloved by everyone from Prince to Duran Duran

https://www.musicradar.com/music-tech/this-analogue-synth-will-blow-your-mind-behringer-unveils-sds-3-a-usd249-clone-of-the-classic-simmons-drum-synth