low profile design, with robust door interface. Tool free battery replacement on the left arm and phillips head screw access on the drive side
Weight
Only adds 35g (Stages Power LR) / 15g (Stages Power L) / 20g (Stages Power R) to base crank set
Battery life
175+ hours (Stages Power LR, via 2 coin cell: CR2032), 200+ hours (coin cell: CR2032) when used as a single sided Stages Power L or Stages Power R meter