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K-ULTRA-OTG – Ultra Tiny Wearable Audio Recorder with Voice Activation 8GB

MAP-PRICE: $109.00

Voice Activated Wearable Audio Recorder

Tiny Size just 2 Inches Long

8GB Internal Memory

Onboard Playback

OTG Optimized

18 Hours Continuous Recording

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Trusted by Hundreds of clients domestically and internationally.


What you need when you need it.


Support hours:

Monday to Friday


Orders received by 1PM MST go out the same day for all US clients.

All Orders ship from our Head Office location in Draper, Utah


PBN-TEC adopt a strict MAP pricing policy

  • Voice Activated Clip On Recorder
  • Onboard Play Back
  • 288 Hours of Storage Capacity – 8GB
  • 40 Feet Mic Range
  • Time and Date Stamping
  • OTG Optimized – Playback on all major OS including iPhone & Android.
  • 18 Hour Battery – Recharge via USB Port or USB enabled electrical plug.
  • 2 hours to full charge
  • Ultra-Tiny size – Just 2 inches tall.


The K-Ultra-OTG Voice activated wearable audio recorder is ideal for users who need to record audio during close encounters.

The Tiny device can be placed inside a pocket or clipped to clothing using the metal clip supplied.

K-Ultra can also be used to record audio whilst placed in a location, the miniscule size of this device ensures it will be very difficult to notice.

Record crystal clear audio from upto 40 Feet away.


Professional Features and Multiple Playback Options


The K-Ultra OTG is packed with professional features and can record for upto 18 hours in a single charge.

This tiny device can store upto 288 hours of audio files and has 8GB of internal memory.

Users can listen to their audio files directly through the device using the supplied headphones.

Users also have the ability to directly connect to their iPhone or Android using the included OTG adapter.

Once connected to a phone using the OTG adapter, users can listen to their audio files through their phone and save. share the files using a variety of applications on their phones.

Users can also connect the device to a PC/MAC and listen to the audio files through a computer.


Built in Software for Mic Sensitivity Configuration


The K-ULTRA-OTG has a custom software built inside which provides users with the ability to configure settings on their device.

Users can adjust the Microphone sensitivity, configure time and date settings and select different audio recording formats through the software.


K-Ultra-OTG can be used for continuous recording or voice activated recording, easily switch between the two modes at the push of a button.

Record high quality audio for upto 18 hours on a single charge from upto 40 FT away.


Specifications – K-ULTRA-OTG

Built-in memory 8 GB
Replaceable memory No
Recording time Up to 18 h
Voice activation function Yes
Recording schedule Yes
  • Built-in
  • Mono
  • Range up to 40 FT
External microphone No
Sampling 22,05 kHz
A/C converter 16 bit
Bandwidth 30 Hz ~ 11 kHz
Flow capacity 64 kbit/s
Power supply of the voice activated dictaphone Built-in Li-Poly 120 mAh battery
Operation time (continuous operation mode)
  • Up to 15 h XHQ
  • Up to 18 h HQ
MP3 player function Yes
Headphones Included – Listen onboard
Interface USB High Speed
Supported systems Windows ME, 2000, XP, Vista, 7, 8, 10 (recordings listening) Windows ME, 2000, XP, Vista, 7, 8, 10, Mac OS X, Linux –  OTG Compatbility:  iPhone/iPad and Android devices including smartphones & tablets
Operation temperature range 0°C – 50°C
Dimensions 18,2 × 55,3 × 11,8 mm
Weight 0.35 oz

User Groups & Pro-Tips

Time and Date stamping is only configurable using a Windows PC.

Requirements & FAQ


  • System Compatibility: Windows Vista, Windows 7, Windows 8, or Windows 10 & 11 & Mac
  • Media player app on phone or computer to play *.MP3 files


Can this devices microphone be adjusted for sensitivity?

Yes, using the onboard software, users can adjust mic sensitivity.

Is this device compatible with Windows & Mac?


More Questions?

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K-ULTRA-OTG Datasheet