The LSD4BT-K55ASTD001 with Wireless Modules RoHS manufactured by Lierda is a high-efficiency Bluetooth Low Energy (BLE) and WIFI module solution based on Qualcomm's new processor, with high-precision positioning, precise computation, and industry-leading RF and power efficiency. It offers excellent communications with the up and downlink throughput of up to 2 Mbps, advanced 12-track hardware-level AES MAC and other features. It also comes with multiple interfaces, including USB, UART, SPI, I2C and other interface, making it suitable for a wide range of applications. It is compliant with ROHS regulations, making it a good choice for applications in the telecom industry or medical applications.