Compliance Class 1，Class 2；
Certified to the United States (FCC), Innovation,Science and Economic Development Canada (ISED), European Economic Area (CE), Korea (KCC), Taiwan (NCC), Japan (MIC), China
(SRRC), and Brazil (ANATEL) radio regulations
Supports Bluetooth 5.0 dual-mode
- BDR/EDR transport for audio, voice, andSPP data exchange
- BLE transport for proprietary transparentservice and Apple Notification Center Service(ANCS) data exchange
High-speed HCI-UART interface (supports up to921,600 bps)
Peripherals
• Built-in lithium-ion and lithium-polymer batterycharger (up to 350 mA)
• Integrated 1.8V and 3V configurable switchingregulator and Low-Dropout (LDO) regulator
• Built-in ADC for battery monitoring and voltagesense
• Built-in ADC for charger thermal protection
• Built-in Undervoltage Protection (UVP)
• An auxiliary input port for external audio input
• Two LED drivers
• Multiple I/O pins for control and status
DSP Audio Processing
• Supports 64 kbps A-Law, A-Law PCM format/Continuous Variable Slope Delta (CVSD) modulationfor SCO channel operation
• Supports 8/16 kHz noise suppression
• Supports 8/16 kHz echo cancellation
• Supports Modified Sub-Band Coding (MSBC)decoder for wide band speech
• Built-in High Definition Clean Audio (HCA) algorithmsfor both narrow band and wide bandspeech processing
• Packet loss concealment (PLC)
• Built-in audio effect algorithms to enhance audiostreaming
• Supports Serial Copy Management System(SCMS-T) content protection