FSC-BT3721V is a small-size AEC-Q100 Bluetooth Low Energy 5.3 automotive level SoC module based on Silicon Labs EFR32BG22 chip, suitable for car key system, in-car sensor network system, automotive control system, on-board diagnostic system. It has server/client integrated, multi-connection, high-speed throughput transmission function, first-class ultra-low transmission power and reception power, high performance, low power consumption characteristics designed to ensure excellent connection stability, transmission reliability and safety.