Stages Power meter is built on Shimano Dura-Ace R9200. The Stages Power meter is placed on both sides of the crank in order to independently measure a rider's left and right legs.

• Accuracy: ± 1.5%
• Power meter housing: low profile design, with robust door interface
• Weight: Only adds 15g to base crank arm
• Battery Life: 175+ hours (coin cell: CR2032) 
• Power range (Watts): 0 to 2500
• Cadence range (rpm): 10-220
• Water resistance rating: IPX7

"In summary this is the best Shimano based dual sided power meter crankset that I have tested either indoors or out." - Shane Miller, GPLama 
Check out his review here.

The Dura-Ace 9200 crankset is compatible with all 12-speed Shimano Hollowtech II road bottom brackets.

Don't know which Power Meter to pick? Learn your Crank Model