Rolton K400 Voice Amplifier & Headset Microphone Kit

Rolton K400 Portable Voice Amplifier & Headset Microphone Kit

Whether you're leading a classroom, guiding a tour group, running a promotion, or presenting at a meeting, the Rolton K400 Voice Amplifier Kit keeps your voice clear, confident, and effortlessly heard — without straining. This compact, wearable speaker system includes a professional wired headset condenser microphone, delivering crisp omnidirectional audio pickup and powerful output in a surprisingly small package. Made in Mainland China.

Why Choose the Rolton K400?

• Powerful 5W+ Audio Output — Projects your voice clearly to groups of 20–50 people, indoors or outdoors.
• Wearable & Lightweight Design — Compact unit (H 8.5cm × W 8.5cm × D 3.4cm / approx. 3.3" × 3.3" × 1.2") clips easily to a belt or waistband for hands-free comfort.
• Long-Lasting 1200mAh Detachable Battery — Up to 8 hours of continuous use; replaceable 18650 cell so you're never stuck mid-session.
• USB Charging Convenience — Charges via any standard USB 5V charger (including your phone charger); charger current should be 500mA or greater.
• USB & TF Card Music Playback — Plug in a USB drive or TF/microSD card to play background music between sessions or during events.
• Omnidirectional Condenser Headset Mic — Picks up your voice naturally from all angles for smooth, consistent audio without repositioning.
• Easy Knob Volume Control — Simple rotary dial lets you adjust volume on the fly, even mid-presentation.
• Wired Reliability — Zero latency, no pairing, no battery drain on the mic — just plug in and speak.

What's in the Box?

• 1 × Rolton K400 Loudspeaker
• 1 × 1200mAh Rechargeable 18650 Battery
• 1 × Professional Wired Headset Condenser Microphone
• 1 × USB Charging Cable
• 1 × Waistband Belt Clip
• 1 × Instruction Manual

Technical Specifications

• Brand: AyeBeau / Rolton K400
• Audio Output: >5W
• Battery Capacity: 1200mAh (detachable)
• Playback Time: ~4–8 hours (at 50–80% volume)
• Charging Input: Standard USB 5V
• Microphone Type: Condenser, Omnidirectional Polar Pattern
• Connection: Wired
• Media Support: USB Disk, TF Card
• Dimensions: H 8.5cm × W 8.5cm × D 3.4cm
• Country of Origin: Made in Mainland China

Perfect For

Teachers, lecturers, tour guides, fitness instructors, event hosts, sales promoters, coaches, and anyone who needs to address a group without raising their voice.

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For guidance on safe use of portable audio equipment and hearing protection, see the CDC's Noise and Hearing Loss Prevention resource.

Frequently Asked Questions

Q: Can the Rolton K400 voice amplifier be used outdoors for tour guiding?

A: Yes! The Rolton K400 is specifically designed for both indoor and outdoor use. Its 5W+ audio output is strong enough to address groups of up to 50 people in open spaces, making it ideal for tour guides, outdoor fitness classes, and promotions.

Q: How long does the battery last on the Rolton K400 headset microphone kit?

A: The included 1200mAh detachable 18650 battery provides up to 8 hours of use, or approximately 4–8 hours of music playback at 50–80% volume. The battery is also detachable, so you can carry a spare for all-day events.

Q: Does the Rolton K400 support Bluetooth or is it wired only?

A: The Rolton K400 uses a wired headset condenser microphone for zero-latency, reliable audio transmission. It does support USB disk and TF card playback for music, but the microphone connection is wired — ensuring consistent, interference-free performance in any environment.

Q: What type of charger does the K400 voice amplifier use?

A: It charges via any standard USB 5V charger — your existing smartphone charger works perfectly. Just make sure the charger output is at least 500mA for efficient charging.