TDCM Torque Sensing Bottom Bracket, CA3 Compatible. 114mm Spindle
The TDCM bottom bracket has 12 pole cadence sensor as well as a 2.5-3.3V voltage output that is proportional to the chain tension on the crank, and works great when you are after a responsive pedalec mode without concern of the exact human watts.
USER GUIDE HERE
Sample Installation Video HERE (THUN sensor)