Phin Sync is a fully implantable brain-computer interface (BCI) platform designed for individuals with spinal cord injury, amyotrophic lateral sclerosis (ALS), locked-in syndrome (LIS), and other conditions causing loss of voluntary motor function, helping them regain independent control over their environment. A high-spatial-resolution, minimally invasive thin-film cortical electrode covers key regions of the motor network, including the primary motor cortex (M1), dorsal premotor cortex (PMd), and sensory motor cortex (S1), enabling reliable acquisition of motor-intention electrocorticography (ECoG) signals. Neural data are transmitted through a skull-mounted wireless interface featuring biocompatible packaging and thermal management, enabling a leadless, fully implantable architecture. Proprietary signal processing and decoding software converts motor-intention signals into digital control commands, allowing users to interact with computers, assistive technologies, powered wheelchairs, robotic systems, and other connected devices. By restoring independent environmental control, Phin Sync empowers users to reconnect with the world through intuitive brain-driven communication.