Shimano SL-M670 Indicator Unit Always know where you're at on your gear range with one of these Shimano SLX SL-M670 indicator units. The indicator unit easily attaches to SLX SL-M670 Rapidfire Plus 10 speed trigger shifters. Compatibility Notes: SLX SL-M670 Rapidfire Plus trigger shifters 10 speed only | Shimano SL-M670 Indicator Unit Right, Shimano# Y6Vt98040