The RDA RDA5871 is a Bluetooth 2.1-compliant single-chip baseband processor with an integrated 2.4 GHz transceiver, designed for low-power wireless input devices such as keyboards, mice, game controllers, and remote controls. It includes an ARM7-based microprocessor with on-chip ROM and RAM and built-in firmware supporting the Bluetooth Human Interface Device (HID) profile, which simplifies design by reducing the need for external components. The RDA5871’s integrated design delivers robust communication in the globally available ISM band, low power consumption, and minimal external circuitry, making it ideal for cost-effective consumer peripherals.