Headworn Microphone Voice Amplifier with Wired Mic and Rechargeable Battery Kit
$23.99 – $25.99Price range: $23.99 through $25.99
Portable Mini Loudspeaker with Wired Microphone
Product Overview
The Rolton K400 mini loudspeaker is a compact and versatile audio solution designed for clear communication and music playback. Ideal for teachers, tour guides, promoters, and meeting speakers, this lightweight device offers convenient volume control and supports USB and TF card inputs for flexible audio options. Its portable size and detachable battery make it easy to carry and use anytime, anywhere.
Key Features
- Supports USB disk and TF card for music playback
- Audio output power greater than 5W for clear sound
- Detachable 1200mAh 18650 rechargeable battery lasting up to 8 hours
- Simple charging via standard USB 5V, compatible with mobile phone chargers
- Convenient knob volume control for easy adjustment
- Includes professional wired headset microphone and waistband belt
- Compact dimensions: 8.5cm x 8.5cm x 3.4cm (3.3″ x 3.3″ x 1.2″)
Benefits
The Rolton K400 offers an efficient and portable audio solution with practical features designed to enhance your speaking and listening experience.
- Extended battery life ensures uninterrupted use during long sessions
- Detachable battery allows for quick replacement and continued operation
- Easy volume control helps customize sound levels to any environment
- Multiple input options let you play music directly without extra devices
- Portable size and belt attachment offer hands-free convenience
- USB charging compatibility means charging is simple and accessible
Everyday Use
Whether you’re leading a classroom, guiding a tour group, conducting a promotional event, or hosting a meeting, the Rolton K400 keeps your voice heard clearly. Use the included wired headset microphone to move freely while speaking. Store and play your favorite audio files via USB or TF card to add extra engagement. The lightweight and compact design makes it perfect to carry in a bag or on your waist throughout the day.
Product Details
- Dimensions: Height 8.5cm, Width 8.5cm, Depth 3.4cm (3.3″ x 3.3″ x 1.2″)
- Battery: Detachable 1200mAh 18650 rechargeable lithium-ion battery
- Battery life: Up to 8 hours standby, 4-8 hours playback at 50%-80% volume
- Charging: Standard USB 5V input, recommended charger current >500mA
- Audio power: Output >5W
- Included accessories: K400 loudspeaker, 1200mAh battery, wired headset microphone, USB charging cable, waistband belt, instruction manual
Why Customers Love It
Users appreciate the Rolton K400 for its ease of use, portability, and reliable performance. Its long battery life and clear sound output make it a dependable choice for professionals who need to communicate effectively on the go. With thoughtful features and accessories included, it delivers excellent value for all your speaking and audio needs.








| Weight | 0.258 lbs |
|---|---|
| Dimensions | 17 × 12 × 6 in |
| Brand Name | AyeBeau |
| Transducer | Condenser Microphone |
| Set Type | Multi-Microphone Kits |
| High-concerned chemical | None |
| Style | Headset Microphone |
| Use | Teaching |
| Communication | Wired |
| Built-in Battery | Yes |
| Package | Yes |
| Polar Patterns | Omnidirectional |
| Certification | NONE |
| Diaphragm | S-Mall |
| Mikrofon | Mikrofon |
| Microphone for singing | Microphone for singing |
| Audio system | Audio system |
| Mike | Mike |
| Microphone for sound | Microphone for sound |
| Microphone kit | Microphone kit |
| Choice | yes |

A***T –
It’s with a battery (not batteries), it sounds good, lasts quite a bit, the quality price is satisfactory. arrived quickly, comes with a microphone with a lanyard for hanging and a hook
Color: Black
Anonymous –
Got this parcel in 12 days after order to zhytomyr (ukraine).
Tested bluetooth – it’s ok. Microphone mode can be connected from 2nd or 3rd time – you need set volume max and switch to ‘voice mode’. I recommend this item and seller.
Mic quality is middle – too thick wires, don’t break that.
Color: Black
M***s –
small but very powerful, it is for small spaces
Color: Black
M***a –
I’ve already used it and frankly it’s good, for how small it is it has quite a bit of power. I use it to give classes in a hall with a lot of ambient noise and it’s fine. I highly recommend it, the only thing is that for using it outside I’m not sure if the power would be sufficient.
Color: Rose
F***a –
Received very quickly, in half the advertised time, it sounds perfectly in a room environment even with the noise of children.
Color: Black
Y***z –
It arrived before the expected date, I have already tried it and it works very well.
I love it, I use it to call the children at school.
Color: Rose
M***y –
Good quality and sounds very well
Color: Rose
T***v –
It looks great!
Color: Black
B***r –
Good
Color: Black
A***a –
For now it works great. My daughter received it as a gift and she loves it. It doesn’t have a large volume but just enough to sound great.
Color: Black
M***a –
Very good quality, I recommend it.
Color: Black
Anonymous –
Excellent item for the girl to enjoy. Good audio and volume ratio, perfect for dressing up as Zoey from K-Pop and singing.
Color: Black
Anonymous –
Excellent product for the price. The sound quality is excellent. I use it in a children’s park where there are a lot of people, and my group can hear me very well.
It is easy to use and charges very well.
Color: Black Ships From:
Anonymous –
Basic voice amp, will work well for cosplay. Mic fits under the helmet
Color: Black Ships From:
T***e –
I am satisfied.
Initially, I thought I had spent money for nothing. When I went to teach my classes with her, I found that the sound is reasonable.
It has a very compact size and the battery lasts a long time.
The Type-C input on the charger is also a very good feature.
Color: Black