SHIDU S518 Wired Voice Amplifier – 10W Rechargeable PA Speaker for Teachers
The SHIDU S518 is a wired voice amplifier (personal PA system) with a cable-connected microphone, designed to project a teacher's or presenter's voice clearly to a full classroom or tour group without straining. It delivers 10W of output power through a 2.5-inch internal magnetic speaker, is powered by a 2000mAh rechargeable battery with Type-C fast charging, and includes Bluetooth 6.0 for playing audio from a phone or tablet. Weighing just 393g in a compact ABS body, it is an ideal voice amplifier for teachers, tour guides, lecturers and public speakers who need reliable, hands-free amplification on the move.
Key Features
10W clear sound output – powerful enough for classrooms of up to 60 people, using a 2.5-inch internal magnetic speaker.
Wired microphone for zero-latency voice – a cable-connected lavalier/gooseneck mic keeps your voice natural and feedback-free, ideal for continuous speaking.
2000mAh rechargeable battery – long-lasting operation for a full teaching day; recharge via Type-C port (5V / 1.5A).
Bluetooth 6.0 connectivity – wirelessly play music, audio books or lesson materials from a smartphone or tablet.
Ultra-lightweight 393g design – comfortable to carry all day; comes with a lanyard and charging base.
Wide working temperature range (-10℃ to 45℃) – reliable in classroom and outdoor environments.
Durable ABS casing in a cute purple design – kid-friendly and visually appealing for teaching and child applications.
Technical Specifications
| Specification | Value |
|---|---|
| Model | SHIDU S518 wired |
| Output Power | 10W |
| Speaker | 2.5-inch internal magnetic speaker |
| Frequency Response | 100Hz – 18KHz |
| Microphone | Wired (cable) microphone |
| Bluetooth Version | 6.0 |
| Battery Capacity | 2000mAh |
| Charging | 5V / 1.5A, Type-C charging port |
| Weight | 393g |
| Size | 118 × 110 × 41mm |
| Case Material | ABS |
| Color | Purple |
| Working Temperature | -10℃ ~ 45℃ |
| Interface | Type-C charging port / MIC |
Who Is the S518 For?
Teachers & lecturers – deliver lessons hands-free to a full classroom without vocal strain.
Tour guides – keep a group of visitors clearly informed outdoors or in noisy venues.
Trainers & coaches – give presentations and training sessions in halls and gyms.
Wired vs. Wireless Voice Amplifier: Which to Choose?
A wired voice amplifier like the S518 uses a cable-connected microphone, which means your voice is always transmitted with zero latency and no interference risk – the most stable choice for teachers and presenters who talk continuously. A wireless (UHF / 2.4G) voice amplifier gives the presenter freedom to move across a stage without a cable, at the cost of battery and occasional signal considerations. If your priority is rock-solid, natural voice amplification at a lower price, the S518 wired amplifier is the reliable choice; if you need to roam the stage freely, see our SHIDU wireless voice amplifier series.
What's in the Box
1 × SHIDU S518 voice amplifier
1 × Wired headset microphone
1 × Charging base
1 × Lanyard / shoulder strap
1 × Type-C charging cable
1 × User manual
Why Choose SHIDU as Your Manufacturer?
SHIDU Acoustic (Shenzhen SHIDU Digital Co., Ltd.) is a professional voice amplifier and PA system manufacturer. We offer factory-direct pricing, OEM/ODM customization, strict quality control and responsive after-sales support, with a dedicated team responding to inquiries within 24 hours. Whether you need a single unit for your classroom or bulk supply for distribution, we can meet your requirements.
Frequently Asked Questions (FAQ)
Q: Is the SHIDU S518 a wired or wireless voice amplifier?
A: The S518 is a wired voice amplifier – it uses a cable-connected microphone, which provides stable, zero-latency voice transmission ideal for teachers and presenters.
Q: What is the output power and speaker size of the S518?
A: The S518 delivers 10W output through a 2.5-inch internal magnetic speaker, with a frequency response of 100Hz–18KHz.
Q: How is the S518 powered and charged?
A: It has a 2000mAh rechargeable battery, charged via a Type-C port at 5V / 1.5A. Working time: 8-10 hours（ with 50% volume ）
Q: Does the S518 support Bluetooth?
A: Yes, it features Bluetooth 6.0 for playing audio from smartphones and tablets.
Q: How much does the S518 weigh?
A: It weighs just 393g with a compact body of 118 × 110 × 41mm, making it easy to carry all day.
Q: Can I get custom (OEM/ODM) orders for this amplifier?
A: Yes. As a manufacturer, SHIDU supports OEM/ODM customization. Contact us with your requirements and we'll respond within 24 hours.
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