The BK3221 Bluetooth Stereo Audio Module is designed for high-quality wireless audio applications. It supports Bluetooth V2.1 + EDR and multiple audio protocols, including HFPV1.5, A2DPV1.2, and AVRCPV1.0, ensuring efficient and stable audio transmission. With low power consumption, extended wireless range, and versatile interface options, it is suitable for various Bluetooth audio systems.
Specifications of BK3221 Bluetooth Stereo Audio Module

Bluetooth Version: V2.1 + EDR

Supported Protocols: HFPV1.5, A2DPV1.2, AVRCPV1.0

Operating Voltage: 3.3V

Operating Current: ≤ 60mA

Standby Current: < 500µA

Operating Temperature: -40°C to +85°C

Transmission Range: More than 10 meters

Transmission Power: CLASS2, 3dB

Sensitivity: -80kHz (<0.1% BER)

Frequency Range: 2.4GHz–2.480GHz

Interfaces: I2C, SPI, UART

Audio Performance: SBC decoding

Signal-to-Noise Ratio: ≥ 60dB

Dimensions: 25×13.5×1.8mm

Datasheet of BK3221 Bluetooth Stereo Audio Module
Datasheet