Magene S3+ Ant+ Bluetooth Bike Speed Cadence Sensor W9I4 *1 8I9E M8X2 S1I4 P1Q6
Wireless interface: Bluetooth/ant+. Sensor: Geomagnetic sensor. In speed mode, you need to set the wheel size to use the app. Product: Speed sensor. Install the battery to switch the mode speed model to the rhythm model.