BTE hearing aid JH-338

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Short overview

• Product: Binaural behind-the-ear (BTE) hearing amplifier for speech frequencies (OTC)
• Model: JH-338
• Configuration: Binaural kit — 2 amplifiers + 1 USB charging dock
• Signal processing: Analog (no digital chip)
• Controls: One-key ON/OFF sliding switch; infinitely adjustable volume wheel
• Power & charging: Rechargeable — USB charging dock with LED indicators (red charging, green full)
• Operating time: Up to 15 hours per charge (manufacturer claim)
• Charging time: ~2.5 hours (manufacturer claim); alternative attribute lists up to 7 hours
• Certifications: FDA registered, CE (MDR), ISO 13485
• MOQ (wholesale/OEM): 1,000 pcs

Designed for simplicity and comfort
The JH-338 is a rechargeable binaural BTE hearing amplifier intended for users with mild-to-moderate hearing needs. The design focuses on easy daily use, discreet appearance and ergonomic fit with a soft curved ear wire and ear hook to secure the device behind the ear.

User controls and indicators

• Clear one-key ON/OFF sliding switch with visible green indicator when powered on.
• Smooth, infinitely adjustable volume wheel for continuous gain adjustment (slide up to increase, down to decrease).
• LED indicators on the USB charging dock: red while charging, green when fully charged.

Main components and functional overview

• Ear hook: secures device and prevents dropping.
• Sound guide tube / soft ear tube: comfortable delivery of amplified sound.
• Receiver: converts amplified signal for the ear canal.
• Volume wheel / keys: continuous adjustment for personalised hearing.
• Switching key: one-key ON/OFF control with visible status indicator.
• Ear domes: skin-color, discreet; multiple sizes included (S/M/L).

Recharge and power
The product ships with a dedicated USB charging dock. Typical charging time is approximately 2.5 hours with up to ~15 hours continuous operation per charge (manufacturer specification). Some product attributes list alternative battery types and charge times (Li‑ion main description; NI‑MH noted in alternate attributes and charging time sometimes listed as 7 h). The USB dock enables convenient charging from PCs, adapters or power banks.

Noise reduction and audio quality
The JH-338 includes features intended to improve listening comfort: high-definition sound claims, dual-stage noise reduction to reduce background interference and ergonomic choices for extended wear comfort. As an analog amplifier, it provides linear gain in the speech frequency bands specified in the technical data.

Package contents

• 2 × JH-338 hearing amplifiers (binaural)
• 1 × USB charging dock / storage box
• 8 × Ear domes (various sizes)
• 1 × Cleaning tool
• 1 × Charging cable
• 1 × User manual

Notes on fit and use
The devices are non-handed (no left/right distinction), enabling flexible binaural or single-ear use. The soft curved ear wire can be adjusted to suit different ear anatomies. Simple controls and a discreet skin-color design make the product suitable for elderly users and for easy daily operation.

Technical specifications

• Model: JH-338
• Type: BTE analog hearing amplifier (OTC)
• Configuration: Binaural — 2 units + USB charging dock
• Signal processing: Analog (no digital chip)
• Max OSPL90: ≤128 dB ±3 dB
• Max gain (FOG50): ≤50 dB ±3 dB
• Input noise (EIN): ≤29 dB ±3 dB (alternate listing <26 dB)
• Frequency range: 400–4200 Hz (alternate listing 500–3200 Hz)
• Total harmonic distortion: frequency-dependent (e.g. 500 Hz ≤3%, 800 Hz ≤5%, 1600 Hz ≤1%)
• Operating current: ≤5 mA (alternate attribute ≤4 mA)
• Battery: Rechargeable Li‑ion (main text) / NI‑MH (alternate attribute)
• Charging time: ~2.5 h (manufacturer) / alternative 7 h listed
• Working time: up to ~15–16 h per charge
• Charging method: USB charging dock with LED indicators
• Controls: one-key ON/OFF sliding switch; infinitely adjustable volume wheel
• Accessories: ear domes (S/M/L), cleaning tool, charging cable, user manual
• Certifications: FDA registered, CE (MDR), ISO 13485
• MOQ: 1,000 pcs