Scienlodic USB Rechargeable Sound Amplifier – Adjustable Tone

Scienlodic USB Rechargeable Personal Sound Amplifier

Enhance everyday conversations and enjoy clearer, fuller sound with the Scienlodic USB Rechargeable Personal Sound Amplifier. Designed with seniors and first-time users in mind, this compact, discreet device features adjustable tone modes and volume control so you can customize your listening experience with ease. No batteries to swap — simply recharge via USB and enjoy up to 40 hours of continuous use.

Made in China.

⚠️ Important Note: This listing includes the USB charging cable only. A 1–2A charging head (not included) is required for charging. We recommend using a standard 1–2A USB charging adapter.

Key Features

• USB Rechargeable – No disposable batteries needed. Charges fully in 4–6 hours (8 hours for the first charge), providing up to 40 hours of use.
• Adjustable Tone Modes – Choose between Low Frequency Compression mode ("H"), Normal mode ("N"), and 4 volume levels for a tailored listening experience.
• Sleek, Discreet Design – A cosmetically appealing profile with an internal speaker for smooth, natural-sounding audio amplification.
• Digital Sound Processing – Channel-based processing gives you direct control over volume output.
• Multiple Earplug Sizes – Comes with 3 different-sized silicone earplugs for a secure, comfortable fit that helps minimize audio feedback.

Technical Specifications

• Max OSPL: ≤129dB ±3dB
• Max Sound Output: 117dB ±4dB
• Max Sound Gain: 38dB ±5dB
• Frequency Range: 450Hz – 3000Hz
• Total Harmonic Distortion: ≤10%
• Input Noise: ≤28dB
• Charging Time: 4–6 hours (8 hours for first use)
• Battery Life: Up to 40 hours (varies by volume level)

Mode Guide

• OFF — Powers the device off
• H — Low frequency compression mode
• N — Normal usage mode
• 1–4 — Volume levels (1 = lowest, 4 = highest)

What's in the Box

• 1 × Scienlodic Sound Amplifier
• 3 × Silicone Earplugs (Small, Medium, Large)
• 1 × USB Charging Cable (1–2A charging head not included)
• 1 × User Manual
• 1 × Gift Box

Tips for Best Performance

1. Always start at the lowest volume setting before inserting the device.
2. Select a slightly larger earplug for a snug seal to minimize audio feedback whistling.
3. Gradually increase the volume — avoid sudden jumps in amplification level.
4. After inserting, gently press and hold the device in your ear canal for 1–2 seconds to allow the earplug to fully expand and seal.
5. Keep the silicone earplugs clean for best sound clarity and hygiene.

Charging Notice

Always use a compatible 1–2A USB charging adapter. Using an incompatible charger may damage the device. This product does not include a charging head — only the USB cable is provided.

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Frequently Asked Questions

Q: Does the Scienlodic sound amplifier come with a charging head?

A: No — this listing includes only the USB charging cable. You will need a standard 1–2A USB charging adapter (not included) to charge the device. Most standard phone chargers with a 1–2A output are compatible.

Q: How do I reduce feedback whistling when using the sound amplifier?

A: Start with the volume at the lowest setting before inserting the device. Choose a slightly larger earplug size for a better seal in your ear canal, and gently press the device inward for 1–2 seconds after insertion to allow the earplug to fully expand. A proper seal significantly reduces the chance of feedback noise.

Q: How long does the battery last on a single charge?

A: The device provides up to 40 hours of use on a full charge, depending on the volume and amplification level selected. Charging takes 4–6 hours (allow 8 hours for the very first charge).

Q: Can I switch between tone modes during use?

A: Yes. The device features two main listening modes — Low Frequency Compression ("H") and Normal ("N") — plus four volume levels (1–4). You can switch between modes and adjust volume at any time to suit your listening environment.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.