1.1. Features

 Operation voltage from 2.8 V to 4.2 V

 9 mA average current for A2DP

 300 uA for 500 ms sniff current

 0.8 uA deep sleep current

 Bluetooth 4.2 classic and low energy

 A2DP v1.3, AVRCP v1.6, HFP v1.7, HID v1.1, AVCTP v1.4, AVDTP v1.3, and SPP v1.2

 True wireless stereo and two active link

 Two wires UART download interface

 16 bits stereo ADC and DAC

 Stereo line in and dual microphone

 Five bands digital hardware equalizer

 SPI, UART, I2C, SDIO and USB

 I2S master and slave interface with MCLK output

 Interface for external PA and LNA

 Up to 220 mA battery charge controller