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Tiny square magnetic recorder, 0.25 inches thick, matte finish, USB-C port and 3.5 mm jack visible

COHANA GL-37 128GB Magnetic Voice Recorder

SKU CH-NPEW-WHY01

Magnetic 128 GB recorder stores 9000 hours, runs 90 days standby and cuts 92 % of background noise

  • Recording Formatwav
  • Recording Media128 GB
  • PC InterfaceUSB3.0_C
  • ConnectorHeadphones: 3.5 millimeters
  • Battery5 grams, 90 days, lithium_polymer, 3.7 watt_hours, 1
  • Battery Life90 days
  • 128 GB capacity stores up to 9000 hours of audio recordings
  • AI noise reduction filters up to 92 % of background sound
  • Magnetic dual-sided mount enables hands-free recording on metal surfaces
  • USB 3.0 Type-C and 3.5 mm headphone jack for fast transfer and playback
  • 90-day standby battery life supports long-term deployment without recharging

Ultra-Slim Magnetic Voice Recorder

The COHANA GL-37 is a 128GB magnetic voice recorder measuring 0.25 inches thick and weighing 13 grams. It captures audio in WAV format with adjustable bitrates from 512 Kbps up to 3072 Kbps. The built-in 360-degree microphone with automatic gain and AI noise reduction filters up to 92% of background noise. It suits students, professionals and journalists who need a discreet, portable device for lectures, meetings and interviews.

Replaces Bulky Recorders and Separate Storage

This unit replaces larger handheld recorders and separate USB drives by combining recording, MP3 playback and file storage in one magnetic square. The jump is worthwhile when you need hands-free attachment to metal surfaces, up to 9000 hours of recording at 32 Kbps, or 90 days of standby time from the 3.7 Wh lithium-polymer battery. It is not for buyers who require internal storage beyond 128GB or who need a second simultaneous recording channel.

Plug-and-Play with USB-C and 3.5 mm Output

Installation is immediate: the recorder starts in seconds with no app or Wi-Fi setup, and connects via USB 3.0 Type-C to Windows, Mac, Android and iOS (with adapter) for file transfer and charging. The 3.5 mm headphone jack allows direct monitoring. The main friction point is managing the five selectable bitrates to balance file size against clarity, and ensuring the magnetic mount has a suitable metal surface for stable placement.

Highlights

  • 128 GB capacity stores up to 9000 hours of audio recordings
  • AI noise reduction filters up to 92 % of background sound
  • Magnetic dual-sided mount enables hands-free recording on metal surfaces
  • USB 3.0 Type-C and 3.5 mm headphone jack for fast transfer and playback
  • 90-day standby battery life supports long-term deployment without recharging

Specifications

BrandCOHANA
ModelGL-37
Recording Formatwav
Recording Media128 GB
PC InterfaceUSB3.0_C
ConnectorHeadphones: 3.5 millimeters
Battery5 grams, 90 days, lithium_polymer, 3.7 watt_hours, 1
Battery Life90 days
SpecificationsBrand: COHANA,
Style: 128G,
Format: wav,
Battery_weight: 5 grams,
Battery_average_life: 90 days,
Battery_cell_composition: lithium_polymer,
Skip_offer: false,
Item_weight: 0.1 kilograms,
Part_number: GL-37,
Unspsc_code: 52161535,
Manufacturer: COHANA,
Model_number: GL-37,
Num_batteries_0_type: lithium_polymer,
Num_batteries_0_quantity: 1,
Num_batteries_1_type: nonstandard_battery,
Num_batteries_1_quantity: 1,
Headphones_jack: 3.5 millimeters,
Item_dimensions: 0.25 L x 0.25 W x 0.25 H inches,
Lithium_battery_weight: 0.8 grams,
Lithium_battery_packaging: batteries_contained_in_equipmen
Dimensions0.25 L x 0.25 W x 0.25 H inches
Weight0.1 kilograms
Package ContentsRecorder, instruction manual, charging cable, headphones

Questions about this item

How thick is the GL-37 recorder so I know if it fits my wallet slot?

The GL-37 measures 0.25 inches thick, roughly the width of two stacked credit cards, so it slides into most wallet pockets or notebook spines without bulge.

Does the magnetic mount need any adhesive or screw holes to stay on a metal filing cabinet?

No adhesive or screws are required; the built-in dual-sided magnets clamp directly onto any ferrous surface such as a filing cabinet, desk leg, or vehicle panel for instant hands-free recording.

When the internal lithium-polymer cell no longer holds a 90-day standby charge, can I replace it myself?

The battery is sealed inside the 13 g chassis and is not user-replaceable; once capacity drops you would need to send the unit for professional service or replace the recorder.

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