Shoumi Review: Wireless Headphones That Work Without Your Phone

Most wireless headphones are completely dependent on your phone. No phone nearby? No music. The Shoumi breaks that rule. Load a Micro SD card with your playlist, put your phone in a drawer, and the headphones play on their own — no Bluetooth connection required.

That one feature changes who these headphones are for. This review covers exactly what the Shoumi does well, what to expect from the audio, and whether they're the right buy for you.

What Makes the Shoumi Different: Built-In MP3 Playback

The defining feature of the KRELOV Shoumi is the TF/Micro SD card slot built into the ear cup. Insert a loaded card and the headphones become a standalone MP3 player — no phone, no app, no Bluetooth pairing needed.

This matters in specific situations that most headphones can't handle:

• Gym workouts where you leave your phone in a locker
• Running without the weight or bounce of a phone in your pocket
• Work environments where phone use is restricted but music helps you focus
• Travel where you want to save your phone's battery for navigation and calls

When you do have your phone nearby, the headphones connect via Bluetooth 5.0 for standard wireless listening, calls, and media control. You get both modes in one headset.

Key Specs at a Glance

Feature Shoumi Bluetooth version5.0 (A2DP, AVRCP, HSP, HSF)Driver size40mm diaphragmFrequency response20 Hz – 20 kHzBattery lifeUp to 20 hours playbackStandby timeUp to 15 daysCharging time1–2 hours via USBConnectivityBluetooth + 3.5mm jack + TF card slotLED displayYes — battery and track indicatorColors availableBlack, Black RGB, White

Audio Quality: What 40mm Drivers Actually Mean

The Shoumi uses 40mm diaphragm drivers — the standard size for full-size over-ear headphones in this price range. A larger driver moves more air, which translates to better low-frequency reproduction. In practical terms: the bass is full without being muddy, and the stereo separation is clear enough to distinguish instruments in layered tracks.

The frequency response of 20 Hz to 20 kHz covers the full range of human hearing. This means the headphones reproduce everything from the lowest bass rumble to the highest treble detail without artificially cutting off either end of the spectrum.

For everyday listening — music, podcasts, calls, videos — the audio quality is solid. These are not audiophile reference headphones, but they deliver noticeably better sound than budget earbuds at the same price point.

Battery Life: Up to 20 Hours of Real Use

The Shoumi is rated for 10 to 20 hours of playback depending on usage mode:

• Bluetooth mode with full features: approximately 10–12 hours
• TF card MP3 mode (Bluetooth off): closer to 18–20 hours

The difference is significant. When you're playing music from the SD card without a Bluetooth connection, the radio transmitter is off and the processor is working less — the battery lasts nearly twice as long. For a full day of travel, a gym week, or a long work shift, you won't need to charge mid-session.

Standby time reaches up to 15 days, which means leaving them on the desk over a weekend won't drain the battery.

Charging takes 1–2 hours via USB — short enough that an overnight charge or a quick top-up before leaving the house covers any gap.

The LED Display: More Useful Than It Looks

The small LED display on the ear cup shows two things: battery level and current track or connection status. This is genuinely useful — you know exactly when to charge before a long session, and you can confirm the headphones are connected without reaching for your phone.

It is not decorative RGB lighting. It is a functional readout. If you're looking for headphones with light-up RGB effects, the KRELOV Feline is a better fit. The Shoumi's display is utilitarian — it tells you what you need to know.

Comfort for Long Sessions

The Shoumi is built for extended wear:

• Soft leather ear pads that cushion the ears without pressing the skull
• Retractable headband with adjustable sizing to fit different head shapes
• Lightweight over-ear frame that distributes weight evenly

For commutes, office use, or long workouts, the design avoids the pressure points that make cheaper headphones uncomfortable after 30 minutes. The ear cups fully enclose the ear rather than resting on top of it (over-ear, not on-ear), which also provides passive noise isolation from ambient sound.

Hands-Free Calling

The built-in high-sensitivity microphone handles calls directly from the headphones. The noise-reduction circuit reduces background sound picked up by the mic, which matters if you're taking calls outdoors, in transit, or in a noisy environment.

In practice, call quality is clear enough for professional calls and video meetings — a meaningful upgrade from having the phone pressed to your ear or using earbuds with minimal mic placement.

Three Connection Modes

The Shoumi supports three independent ways to listen:

1. Bluetooth 5.0 — standard wireless connection to your phone, laptop, or tablet. Bluetooth 5.0 specifically brings faster initial pairing, a more stable connection in crowded signal environments (like airports or gyms with many devices nearby), and lower battery consumption compared to older Bluetooth versions.

2. TF/Micro SD card — insert a card loaded with MP3 files and the headphones play independently. No phone required.

3. 3.5mm audio jack — for wired listening when Bluetooth isn't an option, or when you want zero latency for video or gaming without wireless delay. The included 3.5mm cable handles this.

Most over-ear headphones in this price range offer Bluetooth and a 3.5mm cable. The TF card slot is what separates the AKZ Max600 from the standard options.

Who Should Buy the Shoumi ?

Buy it if:

• You work out and want to leave your phone behind
• You want headphones that can replace a separate MP3 player
• You need reliable call quality for remote work or commutes
• You prefer a functional LED readout over decorative lighting
• You want 20+ hours of battery in MP3 mode

Look at other options if:

• You want RGB light effects (→ KRELOV Feline RGB)
• You need gaming-grade low latency TWS earbuds (→ KRELOV M90)
• You primarily want the smallest possible earbuds for running

Frequently Asked Questions

Can I use the Shoumi without a phone? Yes. Insert a TF/Micro SD card with MP3 files and the headphones play music independently with no phone or Bluetooth connection needed.

What Micro SD card size does it support? The TF card slot supports standard Micro SD cards. Cards up to 32GB are confirmed compatible — enough for thousands of songs.

Does it work wired if the battery dies? Yes. The included 3.5mm audio cable connects the headphones directly to any device with a headphone jack, so the battery level doesn't affect your ability to listen.

Is the microphone good enough for work calls? The built-in noise-reduction mic handles standard voice and video calls clearly. For professional recording or studio use it is not the intended purpose, but for Zoom, Teams, and phone calls it works well.

Does it fold flat for storage? Yes. The ear cups rotate and the headband collapses, making the Shoumi compact enough for a backpack, gym bag, or carry-on.

Bottom Line

The KRELOV Shoumi does something most wireless headphones don't: it works without a phone. The TF card slot, 20-hour battery in MP3 mode, Bluetooth 5.0, LED display, and noise-reduction microphone cover every everyday use case in one device — at a price that's difficult to argue with.

If you've been looking for wireless over-ear headphones that genuinely free you from your phone during workouts, travel, or long work sessions, the AKZ Max600 is built for exactly that.

Get the KRELOV Shoumi — currently 50% off →

Free worldwide shipping · 14-day returns · Available in Black, Black RGB, and White

Published in The KRELOV Journal · Questions? Contact our team