The PineBuds Pro’s buds are based on the BES 2300YP.

BES2300YP Block Diagram

CPU Features:

Memory Features:

  • 4MB Serial Flash On-chip for Custom Program

  • Internal ROM 448KB for critical constants and code

  • Internal SRAM 992KB for critical data and code

BT Features:

  • Bluetooth 5.2 dual-mode compliant

  • Profiles: A2DP, AVRCP, HFP

  • Audio Codecs: SBC, AAC

Audio Features:

  • Support BES Intelligent Bluetooth Retransmission (IBRT)

  • Support FF/Hybrid ANC

  • Dual MICs noise reduction

  • Echo Cancellation

  • Support low power voice activity detection

  • Multi-band EQ and Bass enhancement

  • Support Active Crossover

  • Support TWS

  • HiFi Stereo Audio DAC: 120dB SNR, 110dB DNR

  • HiFi Stereo Audio ADC: 100dB SNR

  • Sample rates from 8 kHz to 384 kHz

  • Support dual/single Mic noise suppression

    • -45dB attenuation nominal 50-200Hz

    • -55dB max attenuation @150Hz

  • Support ambient awareness

  • Support talk through

  • 24-bit audio processing

PMU Features

  • 3.1V-5.5V Input for VBAT

  • Internal LPO for low power mode.

  • DCXO with internal oscillator circuit

  • Internal temperature sensor

Buttons/touch sensors


One capacitive touch sensor is located on the outward facing surface of each bud near the logo.

Charging case

Charging case have a reset button in center under the lid which is hooked to ThinkPlus Semi SY8821 integrated circuit and that button reset it from the safety off mode.



  • Earbud: Unknown

  • Charging case: 70 x 50 x 35mm (unconfirmed)


  • Earbud: 5g

  • Charging case: 65g

IP Rating of Earbuds: IPX4

Dynamic transducer (speaker): 6mm

Microphone: 3 – FeedForward, FeedBack, Talk

System on Chip (in each earbud): BES 2300YP

  • CPU: Dual-core 300MHz ARM Cortex-M4F

  • ROM: 448KB

  • SRAM: 992KB

  • BT shared SRAM: 64KB

  • Flash: 4MB (Endurance erase cycles: >500)


  • Bluetooth: Bluetooth 5.2 dual-mode compliant

  • USB: USB to dual UARTs at charging case


  • Earbud: Built-in LiPo 3.7V 40mAh

  • Charging case: Built-in LiPo 3.7V 800mAh

Ports earbud:

  • 4 pins

Ports charging case:

  • 4 pogo pins

  • USB type-C port 5V 500mA


The charging case’s input power is DC 5V @ 0.5A USB Type-C.