The toothbrush PCB uses Yutai Semiconductor ETA7014 for input overvoltage protection, and uses the Yingjixin IP2326 chip to boost the voltage to charge the two string lithium batteries. The toothbrush handle has a built-in Lingou Chuangxin LKS32MC084DF6Q8 MCU for brushless motor operation control, Fengjia Technology PHY6222 for Bluetooth connection, and Horun Electronics HTR3212 for light control, It is also equipped with acceleration sensor for picking up wake-up function.