This is a readme file containing details of the AK1980 fitness tracker. https://www.amazon.ca/AK1980-Fitness-Activity-Pressure-Waterproof/dp/B07MT8CNGH/
SOC: SmartBond™ DA14585 and DA14586 // https://www.dialog-semiconductor.com/products/bluetooth-low-energy/da14585-and-da14586 https://www.dialog-semiconductor.com/sites/default/files/2020-07/dialog_block_diagrams_14585-6_v3_0.svg
Solder pads in back map to: https://ibb.co/M6jVxTh