A shield FPCB for the nRF52840 Supermini/ProMicro with an IMU, magnetometer, RGBLED, and two buttons. Designed for DIY -based for SlimeVR trackers. -45686 + QMC6309 FPCB Module is a compact, back-mounted shield that solders directly to the underside of the nRF52840 for Supermini or Pro-Micro.(nRF52840 Supermini/ProMicro not included). Very easy to solder.Please use the firmware named 'Chrysalis'. 3- accelerometer/gyroscope ( InvenSense -45686) 3- magnetometer (QMC6309) -B2020RGBA-HF Two push-buttons for SW0 and RESET Pads for battery wires Color: As Shown Material: PCB Package Contents: 10*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.