This handheld PCB is a dedicated circuit board for portable devices among ODM products. This Handheld PCB is tailored for handheld ECG, blood oxygen and multi-parameter monitors, boasting compact dimension, low power consumption, strong anti-interference and steady performance. It integrates signal collection, processing, display and transmission with compact layout, fitting limited inner space of handheld devices. Durable and adaptable to mobile scenarios, it supports battery supply, screen driving, key control and data storage. This customizable ODM component adjusts hardware schemes flexibly to meet diverse demands, delivering dependable core circuit platform for portable medical devices.