Anti-theft technology for the marine world.Digitally Encoded Security System (D.E.S.S.) Key’s ball-and-socket design provides riders with easy and quick starts every time. A radio frequency chip inside the key communicates with the vehicle wirelessly, so your Sea-Doo SPARK starts only when the key code matches the vehicle, for ultimate peace of mind. Unlike previous D.E.S.S. keys, harness now sold separately. Requires Wiring Harness to install on SPARK without iBR (278003491), SPARK with iBR (278003490) and SPARK TRIXX (278003195 and 278003490).