Long Life Covert Audio Recorder with Scheduled Recording Functionality, 4,600 Hours of Storage, & 250 Days Standby Battery

64GB Powerbank Audio Recorder 250 Days Standby & 550 Hours Continuous Professional Covert Audio Recorder with Continuous, Scheduled and Voice Activated Recording Options
Long Life Covert Audio Recorder with Scheduled Recording Functionality, 4,600 Hours of Storage, & 250 Days Standby Battery
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Long Life Covert Audio Recorder with Scheduled Recording Functionality, 4,600 Hours of Storage, & 250 Days Standby Battery

Long Life Covert Audio Recorder with Scheduled Recording Functionality, 4,600 Hours of Storage, & 250 Days Standby Battery

  • 4,600 Hours storage – 64GB (at 32Kbps)
  • 550 Hours Continuous Recording
  • 250 Days Standby Battery
  • Voice Activated, Scheduled & Continuous Modes
  • Magnetic Housing
  • Completely Covert – Fully Functional Powerbank
  • Onboard Playback + OTG Playback
  • 40 Feet Audio Capture
  • Time & Date File Stamping

Professional Grade Digital Audio Recorder with Extra Long Battery Life & Customizable Settings

K-MIC-OTG is an advanced Audio recorder with features that are very easy to use, the covert nature of this device makes it a great choice for anyone who wants to have the ability to record audio covertly at any time, the device works as a fully functional MP3 Player and Powerbank, this provides extra protection to users as it can operate in plain sight, users can also schedule audio recordings and conceal the device on a magnetic surface. A versatile professional Audio recorder with a very long battery life.


The K-MIC-OTG professional voice activated audio recorder was designed to fit almost any circumstance.

  • Includes headphones so you can listen to audio recordings anywhere.
  • Fully functions as an MP3 player and Powerbank.
  • You can also playback recordings on phones, tablets, or computers.
  • Includes an OTG adapter for phones and tablets.

One Button Operation

Turn on the voice recorder with one easy switch. Charge the internal battery with the included USB cable. Charge other devices by plugging them into the recorder. LED indicator shows when recordings start and stop. The powerful magnet allows you to attach the recorder to metal surfaces.

Includes Headphones for onboard playback.

Use the headphones to listen to voice recordings or your own MP3s. You can also use the headphones to switch between voice activated (VOX) or continuous recording modes. The headphones have volume control, play/pause controls, and file deleting or skipping capabilities.

Small Form Factor and Extra Long Battery Life

Because the K-MIC-OTG is a functional power bank, the rechargeable battery is used to keep the recorder in standby mode for an incredible 250 days.

Customize the Advanced Settings to Fit Your Needs

Microphone Sensitivity Change the mic sensitivity (GAIN). Adjust the mic to compensate for background noise, distance, and other environmental factors.
Recording Mode Choose between Continuous Recording or Voice Activated Recording Modes.
File Bitrate The recording bitrate can be compared to the framerate of videos. Lower bitrates mean smaller file sizes but decreased recording quality. Higher bitrates increase recording quality but take up more room on the recorder.
File Format Choose between MP3 and WAV. MP3 files are compressed and take up less room but can mean lower quality. WAV format is uncompressed, meaning a higher quality but larger file size.
File Length Choose how long each recording is. Longer recordings risk losing more recording time if the battery runs out before the recording can be saved.
Recording Timer Set to automatically record for a specific length of time each day for up to 999 days.
Time & Date Stamp Sync the time and date of the recordings with your computer.

Specifications –K-MIC-OTG

Built-in memory 64 GB – 4,600 Hours of Storage at 32Kbps and 580 Hours at 256Kbps
Continuous Recording Time 550 Hours in a single charge
Sound recording activation Yes
Scheduled Recording Yes
Built-in microphone Stereo
Mic Range Up to 40 FT
Recording format MP3, WAV
Power supply Lithium-polymer rechargeable battery
Operation time Up to 550 Hours continuous & up to 250 Days Standby
Player function WMA format


MP3 format

Interface USB & Micro USB
Supported systems Windows Vista, 7, 8,10,11 & Mac OS, OTG Compatibility iPhone/iPad and Android devices including smartphones & tablets
Dimensions 3.5 x 2.3 x 0.875 Inches
Weight 3 oz

1 Review

  • Incredible recorder - this loasted a real long time

    Posted by Anonymous on 17th Aug 2023

    Really happy with this recorder. Laster forever for me, which is a long long time as described. Got all the evidence needed. Thanks

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Shipping & Returns

Audio devices may not be used to violate the privacy rights of others. In no way will Spy Associates or its subsidiaries or partners be held responsible for inappropriate use of these products.

FREE Ground Shipping On All Items Over $199

Receive free ground shipping on all items we carry. Depending on your location, carrier may vary depending on maximizing delivery speed to your location.

Same Day Shipping - Order By 2pm EST Monday - Friday

Your Order will be given to the shipping carrier the same day you place the order, not including national holidays & weekends. Shipping days do NOT include weekends UNLESS you order SATURDAY DELIVERY at checkout. Any order placed after 2pm weekdays or on Saturday / Sunday will be shipped out the next business day.

Some custom built products may require up to 48 hours, which includes custom audio add-ons that may require 72 hours. You will be notified of any delays as soon as possible.

International Shipping & Customs

YES! We ship worldwide. On International Orders, any CUSTOMS FEES are the responsibility of the purchaser NOT SpyAssociates. Every country's import rules are different, so it's impossible to guess how much, and if any fees may apply.

Return Policy

We test all of our products before shipping to ensure they are in working order.

Your Satisfaction Is Our Number One Concern


All products which are special ordered by the person ordering and are NOT subject to cancellations. Due to the nature of our product line, returns will only be accepted for products damaged upon shipment to the customer*. All returns must be authorized by before product(s) is returned. will replace, refund, or credit your account for returned product(s) at's discretion. We have been forced to implement this policy because of the attraction of our products to unscrupulous people who return products after they have profitably gained from the short-term use of the products.

*Special exceptions may be made on a case by case basis determined by In this event, returns are subject to deductions for shipping costs and a 25% restocking charge and must be returned within a ten (10) day period from date of receipt of product(s). NO refunds will be given for products returned without explicit permission from

You Are Guaranteed QUICK & ACCURATE Service

Any return must be authorized by a representative of and under no circumstances will returns be accepted otherwise. Authorization and shipping instructions must be obtained from No returns will be authorized after ten (10) business days of receipt of product(s) by the customer, unless found to be defective, in which case we will replace at no charge once returned with authorized RMA.

We at strive to offer our customers the best products at the best possible prices. Due to the nature of the products, returns will not be accepted unless the product is found to be defective or unless otherwise explicitly stated on the specific product page.

Shipping & Handling Charges Are Non-refundable.


Every product receives FREE LIFETIME SUPPORT. We guarantee all products to be free of defects in workmanship and material for 90 days (some manufacturer's warranty is one (1) year or lifetime - please see info on the page for specific product's details) after sale to the customer. We will replace or repair the product(s) at our option providing there is no evidence of customer misuse, or alteration.

This device will only connect to 2.4 GHz Wi-Fi Networks with passwords that do not contain special characters.

We are unable to guarantee Wi-Fi connection will work with all routers. Although most networks are compatible, certain routers enact stricter security measures that may block remote connections to the camera. Some examples likely to experience these issues are hotels/motels, corporate networks, 4g hotspots, open wifi networks like Starbucks, etc. Some WIFI units require the unit to be paired with a router if the end user is wanting to look at the livestream or receive motion alerts. Only compatible with Android 6 & up, iOS 8 & up. These items will need to format the MicroSD Card before use. This is done through the app.

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