Amazon.com : Ebike Pedal Assist Sensor V12 PAS WP

Signal stability: The use of a new design makes the disk and the magnetic sensor realize coaxial operation. Compared with the general separate sensor, the sensitivity is higher and the model is stable.
More sensitive induction: 12-channel signal output, higher sensitivity; power assist affects the speed, and can automatically recognize the pedal when forward and backward.
Novel design: The integrated structure design of double Hall detection components and built-in disk is unique, novel and beautiful.
Simple installation: installation and disassembly are very simple, the sensor is installed on the left side.
Wide application range: It can be installed on all bicycles and compatible with all controllers.