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Ultra-thin black rectangular recorder with dual magnetic sides, USB-C port and 2.5 mm headphone jack

OIUFEVF A02S 128GB Magnetic Voice Recorder 100h

SKU CH-K1CY-S9QVK

Magnetic voice recorder with 128 GB storage, 100-hour battery, AI triple noise reduction and USB-C

  • Battery runtime100 h
  • Audio recording formatTxt
  • Storage media128 GB
  • Host interfaceUSB C
  • ConnectionHeadphones: 2.5 mm
  • Battery pack0.2 milligrams, 100 h, lithium polymer, 220 milliampere hour
  • 128 GB stores up to 10 800 hours of audio
  • 100-hour battery life powers extended sessions
  • AI triple noise reduction cuts 93 % of ambient sound
  • Double-sided magnets attach securely to metal surfaces
  • 22 in thick and 0.06 lb weight fits in any pocket

Compact magnetic recorder for on-the-go capture

The OIUFEVF A02S is a 128 GB voice recorder that doubles as a USB flash drive and MP3 player. Its 0.22-inch profile and 0.06-pound weight make it easy to carry in a pocket or bag. The two-sided magnetic housing attaches securely to any iron surface for hands-free operation during meetings or interviews. It is not suited for users who need built-in Wi-Fi or cellular connectivity for instant cloud uploads.

128 GB capacity with voice-activated efficiency

The internal memory holds up to 10800 hours of recordings, while voice activation extends practical storage by pausing during silence. A 220 mAh lithium-polymer cell delivers 100 hours of continuous recording on a single charge. The AI triple noise reduction chip suppresses 93% of ambient sound for clearer captures. Buyers needing more than 128 GB of onboard storage will have to offload files regularly or choose a different device.

USB-C interface and 2.5 mm headphone jack

Data transfer and charging use a USB-C connector, while playback monitoring relies on a 2.5 mm headphone port. The recorder stores audio in MP3 format and also saves text files. There is no Bluetooth, Wi-Fi, or proprietary app support, so all file management requires a physical cable connection. Users who expect wireless syncing or smartphone app control will find those features absent.

How it compares

Measured against everything we stock in Digital Audio & Voice Recorders, at today’s prices. Recalculated every night.

Price $74.99
Pricier than about 73% of the 321 comparable items (median $49.99).
Battery runtime 100 h
Higher than about 80% of the 106 comparable items (median 40 h).

Specifications

Product
Brand nameOIUFEVF
Model nameA02S
Storage
Storage media128 GB
Audio & video
Audio recording formatTxt
Ports & slots
Host interfaceUSB C
ConnectionHeadphones: 2.5 mm
Power
Battery runtime100 h
Battery pack0.2 milligrams, 100 h, lithium polymer, 220 milliampere hour, 1
Size & build
Product dimensions2 L × 0.2 W × 1.5 H inches

Questions about this item

Will the USB-C connection on this recorder work with my older laptop that only has USB-A ports?

The recorder uses a USB-C interface for PC connection; a USB-C to USB-A adapter or cable is needed to plug it into a USB-A port.

How can I verify the AI-triple noise cancellation is reducing ambient sound by 93% during a recording?

Play back the file on the device or a computer and compare it to a recording made without the feature; the manufacturer states the chip automatically reduces 93% of ambient noise.

Does the 128GB model include a 2.5mm headphone jack and earbuds for immediate MP3 playback?

The recorder has a 2.5mm headphone connector for playback; earbuds or headphones with a 2.5mm plug must be purchased separately if not already owned.

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