Custom-Chip Apple-Compatible TWS Earbuds

Target Integration: Engineered with customized firmware for seamless iOS ecosystem integration, instant pop-up pairing, and battery status synchronization.

Manufacturing Origin: Direct factory production from Shenzhen, China, offering full-stack OEM/ODM capabilities from acoustic tuning to final packaging.

Core Positioning: A mid-to-high-tier TWS audio solution designed for consumer electronics brands, Amazon sellers, and volume distributors requiring stable yield rates and custom branding.

Standard Compliance: Fully certified for global commercial entry (CE, FCC, RoHS, BQB compliant).

 

 

Parameter	Technical Specification
Chipset Solution	BES / Airoha / JL (Configurable per budget and performance tier)
Bluetooth Version	Bluetooth 5.3 (LE Audio supported, range up to 15m)
Audio Codecs	SBC, AAC (Optimized for iOS and Android decoding)
Driver Unit	13mm Composite Diaphragm Dynamic Driver (Impedance: 32Ω)
Microphone	Dual-Mic ENC (Environmental Noise Cancellation) for voice clarity
Battery Capacity	Earbuds: 35mAh each / Charging Case: 300mAh (with protection IC)
Playtime	5.5 hours per charge (at 50% volume) / 24 hours total with case
Charging Interface	USB Type-C (Supports 5V/1A standard input)
Water Resistance	IPX4 (Sweat and splash resistant for daily use)

 

 

Ecosystem Compatibility: Customized Bluetooth stack ensures instant pairing with Apple devices, displaying accurate real-time battery percentages for both earbuds and the charging case on iOS screens.

Acoustic Performance: Tuned via Brüel & Kjær electroacoustic measurement systems to deliver balanced mids, clear highs, and controlled bass response, maintaining Total Harmonic Distortion THD < 0.5% at 1kHz.

Call Clarity: Integrated dual-microphone beamforming algorithms filter ambient traffic and wind noise, achieving a speech transmission index suitable for hands-free mobile communication.

Low-Latency Mode: Sub-60ms audio-visual synchronization toggle, tested for video streaming and casual mobile gaming.

Power Management: Hardware-level over-current, over-voltage, and short-circuit protection implemented on the PCB charging board to ensure lithium battery safety.

 

 

 

Cell Chemistry: Grade-A cobalt lithium-ion polymer batteries with verified cycle life (retain >= 80% capacity after 500 charge-discharge cycles).

Safety Protocols: Integrated Protection Circuit Module (PCM) preventing over-charging, over-discharging, and thermal runaway.

Charging Efficiency:

• Earbud recharge time: Approx. 50 minutes.
• Case recharge time: Approx. 1.5 hours via Type-C cable.
• Testing Standards: All battery batches undergo 48-hour aging tests and temperature-cycling checks prior to assembly.

 

 

Firmware Customization: Custom boot logos, pairing names, touch-sensor shortcut remapping, and voice prompt language packs.

Industrial Design & Tooling:
Plastic injection molding with custom color matching (Pantone reference).
Surface finish options: Matte rubber oil, high-gloss UV coating, or metallic electroplating.

Hardware Adjustments: Flexible BOM options to swap chipsets, adjust driver impedance, or modify battery capacities based on target price points.

Prototyping Workflow: 3D rapid prototyping (SLA/SLS) delivered within 5 days; functional engineering samples (EVT) available in 14 days.

 

 

Production Facility: 3,500 m² dust-free SMT and assembly workshop located in Guangdong, featuring 4 high-speed Yamaha pick-and-place lines and automated optical inspection (AOI) stations.

In-House Testing Equipment (Visible on Production Line):

• Brüel & Kjær / APx515 Audio Analyzers: Used during acoustic R&D and mass production line sampling to test frequency response, sensitivity, and THD.
• Bluetooth RF Shielding Boxes (Comtest / LitePoint): Deployed for wireless signal testing to verify antenna matching, transmit power, and link stability under simulated interference.
• Programmable Temperature & Humidity Chambers: Used for thermal stress screening of battery modules and complete units.

Quality Control Checkpoints:

• IQC (Incoming Quality Control): 100% inspection of chipsets, batteries, and acoustic diaphragms using digital microscopes and multi-meters.
• IPQC (In-Process Quality Control): SMT solder paste inspection (SPI), AOI, and semi-finished acoustic frequency response screening.
• OQC (Outgoing Quality Control): Full function testing (Bluetooth range, mic sensitivity, touch response, and current leakage) on 100% of finished units.
• Reliability Lab Testing: Drop tests (1.2m concrete surface), salt-spray corrosion tests (48 hours), button-press fatigue tests (10,000 actuations), and hinge durability tests.

 

 

Standard Export Packaging:

• Individual retail box: Recyclable 350g greyboard with matte lamination and custom inner blister tray.
• Master carton: 5-layer corrugated export carton containing 100 units.
• Carton dimensions: 45 x 35 x 28 cm, Gross Weight: Approx. 12.5 kg.

Logistics Support: EXW, FOB Shenzhen, CIF, or DDP shipping options via air freight, sea freight, or international courier (DHL/FedEx/UPS).

Export Compliance: MSDS reports for lithium batteries, UN38.3 air transport certification, and commercial invoice documentation provided for seamless customs clearance.

 

 

 

 

Need a reliable manufacturing partner for your next audio project? Submit your specifications below to receive an engineering quotation and lead time estimate within 24 hours.

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