Rolton K400 Voice Amplifier with Headworn Microphone Kit

Rolton K400 Portable Voice Amplifier with Headworn Microphone

Step up your presentations, lessons, and guided tours with the Rolton K400 Mini Voice Amplifier Kit. This compact, wearable loudspeaker delivers over 5W of clear, powerful audio — perfect for teachers, tour guides, fitness instructors, meeting facilitators, and anyone who needs hands-free projection of their voice. The included professional wired headset microphone sits comfortably over your ear, leaving your hands completely free.

Made in Mainland China.

Key Features

• 5W+ Audio Power — Clear, room-filling sound without distortion
• 1200mAh Rechargeable Battery — Up to 8 hours of continuous use on a single charge
• USB Charging — Charges via any standard USB 5V charger (mobile phone charger compatible); charger current >500mA recommended
• USB & TF Card Playback — Stream music or audio directly from a USB drive or TF/microSD card
• Omnidirectional Condenser Microphone — Captures your voice clearly from all angles with a comfortable headworn fit
• Easy Knob Volume Control — Simple, intuitive dial for on-the-fly volume adjustments
• Waist-Belt Clip Included — Clip the compact speaker to your belt or waistband for true hands-free portability
• Wired Connection — Reliable, interference-free audio every time
• Multi-Use Design — Ideal for teaching, tour guiding, promotions, fitness classes, and meetings

Specifications

• Model: Rolton K400
• Audio Power: >5W
• Battery Capacity: 1200mAh (detachable 18650 cell)
• Play Time: ~4–8 hours (at 50–80% volume)
• Charging: Standard USB 5V
• Polar Pattern: Omnidirectional
• Transducer: Condenser
• Communication: Wired
• Dimensions: H 8.5cm × W 8.5cm × D 3.4cm (approx. 3.3" × 3.3" × 1.2")

What's in the Box

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

Great for

Classroom teachers, school coaches, fitness instructors, museum and tour guides, event promoters, corporate trainers, and anyone who needs amplified, clear voice projection without being tethered to a podium or bulky PA system.

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For guidance on safe use of personal audio equipment and hearing-related considerations, visit the CDC's Noise and Hearing Loss Prevention resource.

Frequently Asked Questions

Q: How long does the Rolton K400 voice amplifier battery last on a full charge?

A: The 1200mAh rechargeable battery provides up to 8 hours of use. When playing music at 50–80% volume, expect approximately 4–8 hours of runtime. The battery is detachable (18650 format), so you can carry a spare for extended sessions.

Q: What type of microphone comes with the Rolton K400 kit?

A: The kit includes a professional wired headworn (headset) condenser microphone with an omnidirectional polar pattern, meaning it picks up your voice clearly regardless of the angle. It sits comfortably over your ear, keeping your hands free.

Q: Can I play music through the Rolton K400 speaker?

A: Yes! The Rolton K400 supports both USB drive and TF (microSD) card playback, so you can play background music, instructional audio, or any audio files directly through the built-in speaker — no phone or Bluetooth connection needed.

Q: How do I charge the Rolton K400 voice amplifier?

A: Charging is simple — use any standard USB 5V charger (such as a smartphone charger) with the included USB charging cable. For best results, use a charger with a current output greater than 500mA.