In-ear True Wireless Stereo earbuds with Over-The-Counter hearing aid functionality. Dual-mode Bluetooth 5.3, Hybrid ANC, LE Audio with HAP, and AI-driven hearing compensation.
PCBA - LEFT
PCBA - RIGHT
Turnkey Package
What's Included in the RH210 Turnkey Solution
Everything your brand needs to launch a Premium TWS Earbuds or OTC hearing product — from hardware to software. Details available under NDA.
Main PCBA × 2 (Left & Right)
Firmware Pre-loaded
Framework / Generic App
Personal Service
Design & Production Guide
Technical Support
Key Features
Engineered for Premium TWS & OTC Hearing
RH210 PCBA integrates advanced audio processing, dual-mode wireless connectivity, and sensor capabilities into a compact modular form factor.
OTC Hearing Aid Ready
Supports HAP (Hearing Access Profile) for direct smartphone-to-hearing-aid connectivity. AI-driven hearing compensation with app-based audiometric testing and RehearFit™ calibration.
Competitve 3QUEST Score
Achieving a leading overall score of 3.2, driven by an exceptional speech clarity (SMOS) score of 3.7 that demonstrates superior voice preservation and effective background noise suppression.
ANC-Based Hearing Test
To ensure maximum accuracy, advanced hearing test protocol is performed with Active Noise Cancellation (ANC) enabled. By isolating environmental noise, the setup provides a pristine listening environment for highly reliable assessments.
AI Call Noise Cancellation
Dedicated DSP with 400KB RAM for intelligent call noise cancellation. Crystal-clear voice quality even in noisy environments with real-time AI speech enhancement.
Production Ready
Compact PCBA form factor designed for in-ear TWS earbuds enclosures. Enables flexible mechanical adaptation for different product ID designs.
LLAPT
Low Latency Ambient Pass Through advanced audio processing technology embedded in RH210MB, designed to deliver real-time external sound awareness for wireless earbuds.
System Architecture
Block Diagram
RH210 PCBA features the RTL8773CORH main chip with integrated connectivity to microphones, speaker, sensors, and charging interface.
Technical Specifications
Hardware Specifications
Main Board — MRH210MB
Hardware Version: A1
| PARAMETER | SPECIFICATION |
|---|---|
| Board Type | PCBA |
| Main Chip | RTL8773CORH（Realtek） |
| MCU RAM | 352 KB |
| DSP RAM | 400 KB |
| Antenna | Chip Antenna（on-board） |
| LED Indicators | Orange × 1, Blue × 1 |
| Speaker Output | 1 Channel（Default: 32Ω unit）* |
| Analog MICs | 3 Channels * |
| Charging Type | 5V DC |
| Battery Charging | Default 4.35V / 60mA |
| Programming Interface | 3.3V UART |
| POGO Pin Connector | 2 pcs |
Audio & Power Performance
Reference test data — subject to change depending on FW version
| PARAMETER | SPECIFICATION |
|---|---|
| FF MIC Sensitivity | 76.2 dB ±3 dB @ 1 kHz, THD < 1% |
| Talk MIC Sensitivity | 72.4 dB ±3 dB @ 1 kHz, THD < 1% |
| Audio Output (SPK) | 86 dB ±3 dB @ 1 kHz, THD < 1% |
| Charging Current | 55 ~ 80 mA |
| Standby Current | 9 ~ 30 mA |
Wireless Connectivity
Dual-Mode Bluetooth Specifications
RTL8773CORH supports simultaneous Classic BT and LE Audio, enabling backward compatibility with existing devices while supporting next-generation audio standards.
RF Performance
| PARAMETER | SPECIFICATION |
|---|---|
| Bluetooth Version | 5.3 Dual-Mode（Classic BT + LE Audio） |
| Supported Codecs | AAC / SBC |
| Transmit Power (BLE 1M) | 6.95 dBm |
| Transmit Power (BLE 2M) | 6.97 dBm |
| Transmit Power (BLE 125k) | 6.91 dBm |
| Transmit Power (BLE 500k) | 6.92 dBm |
| RX Sensitivity (LE 1M) | -100.6 dBm |
| RX Sensitivity (Classic EDR) | -95.6 dBm |
| Power Class | Class 1 / Class 2 Hybrid |
| Indoor Range | ~10 – 20 m（typical） |
| Outdoor Range (Open) | 30 – 50+ m（with Class 1 peer） |
Classic Bluetooth Profiles
| PROFILE | VERSION | FUNCTION |
|---|---|---|
| A2DP | 1.3.x | High-quality stereo audio streaming |
| AVRCP | 1.6.x | Playback control, track info, volume |
| HFP | 1.7.x | Hands-free calling |
| HSP | 1.2 | Headset control |
| SPP | 1.2 | Serial data transfer |
LE Audio Profiles (BLE 5.3)
| PROFILE | DESCRIPTION |
|---|---|
| BAP | Basic Audio Profile – unicast & broadcast audio control |
| HAP | Hearing Access Profile – direct smartphone-to-hearing-aid streaming |
| CAP | Common Audio Profile – multi-scenario audio integration |
| TMAP | Telephony & Media Audio Profile – optimized call/media switching |
Rehear Core Technology
AI-Powered Hearing Enhancement Platform
RH210 PCBA is designed to fully support Rehear's proprietary AI hearing technologies, enabling your brand to deliver professional-grade hearing enhancement at accessible price points.
ANC Hearing Test
App-based audiometric testing with clinically validated accuracy. ANC creates a quiet environment equivalent to a professional soundproof booth, enabling hearing assessment anytime, anywhere.
Clinically Validated
AI Hearing Compensation
Advanced AI algorithms replace traditional frequency-based adjustments with dynamic, data-driven compensation. Real-time processing applied in just 150 milliseconds with zero distortion.
150ms Response
AI Auto-REM
Proprietary AI-based Real-Ear Measurement. In 15 seconds, analyzes unique ear canal acoustics and auto-adjusts gain — no probe tubes or audiologist intervention required.
15-Second Calibration
Ultra-Low Latency Audio
0.2ms latency for hearing aid mode with 625 kHz sampling. Dedicated AI noise reduction mode with < 3ms latency for speech enhancement in noisy environments.
0.2ms Latency
Target Applications
Designed For Your Product
RH210 PCBA Turnkey solution enables rapid development across OTC hearing aid and premium TWS earbuds market segments.
OTC Hearing Aids
Self-fitting hearing aid earbuds with HAP profile, app-based audiometric testing, AI compensation, and RehearFit™ personalized calibration.
Premium TWS Earbuds
High-fidelity true wireless earbuds with Hybrid ANC, AAC/SBC codec, dual-device connectivity, and intelligent call noise cancellation.
Enterprise Communication
Professional-grade call earbuds with AI noise cancellation and HFP 1.7.x for remote workers and business professionals.
Hearing Health Wearables
Personal hearing monitoring devices with clinical-grade audiometric testing and hearing trend tracking capabilities.
Generic
Complete PCBA turnkey solution ready for custom branding, enclosure design, and acoustic tuning. Accelerate your time-to-market.
Resources
Development & Support
Technical Documentation
Complete hardware specifications, schematic reference, BOM list, and mechanical drawings available upon NDA. Contact sales to get started.
Firmware & SDK
Pre-integrated firmware with TWS audio stack. SDK available for custom feature development and acoustic tuning. Details available under NDA.
Framework / Generic App
Companion mobile application framework with hearing test, EQ adjustment, ANC mode control. iOS and Android. Details available under NDA.
Ready to Build Your Next Audio Product?
Get in touch to discuss the RH210 Turnkey solution, request samples, or explore customization options.
