-45686 + QMC6309 with ProMicro NRF52840 Development Board Tracker Module for SlimeVR Tracker and Sm Smol Tracker Module is a module that combines the ProMicro nRF52840 development board with -45686+QMC6309 FPCB module. You only need to solder the battery to use it.(battery not included). Please use the firmware named 'Chrysalis'. The nRF52840 is fully multiprotocol capable with full protocol concurrency 3- accelerometer/gyroscope ( InvenSense -45686) 3- magnetometer (QMC6309) -B2020RGBA-HF Two push-buttons for SW0 and RESET Pads for battery wires Color: Picture Color Material: PCB Package Contents: 1*Tracker Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.