F3K Buzzer mk4 – BEC Regulator with audio feedback

(2 customer reviews)


Powerful precision BEC regulator with audio feedback.


  • High power precision 5V output
  • Designed for 2S lipo batteries
  • Reverse battery polarity protection.
  • Audible battery power surveillance
  • Audible internal temperature surveillance
  • Audible start-up diagnosis
  • Weight including wires : ~4.5gr incl. 20cm cables
  • Operation down to 3V – At battery voltages below 5V the output follows the battery – 0.4V

Current status: Production closed. Limited stock available on special request – Contact us for more information

Out of stock

SKU: 19052014 Category: Tags: , , ,


Quick data:

  • Tested with current peaks of 10A for more than 7.5sec.
  • No upper currentlimit.
  • No electrical noise to interfere with radio reception
  • Compact design.
  • High reliability.

The servos used in DLG/HLG are getting faster, stronger and more powerful all the time. More power output also means that the radio setup also needs more power to utilize the full performance of the system. The biggest concern is if the servos can draw so much power that the battery solution is unable to supply it. If this happens the voltage will drop, and the radio can no longer sustain operation.

We are proud to present the F3K Buzzer mk4 – Regulator with audio feedback. This product is designed to meet the power requirements of any modern F3K ship, with the added safety of audio feedback that lets the user know the current status of the battery. See the manual for further details.

The power capabilities of the regulator are extremely high. The performance  is only limited by the maximum temperature of the components.  Due to the extremely small form-factor, there a physical limit to how much power the system can dissipate continuously (hours of operation). The precise value for the upper limit of continues current is dependent on the ambient temperature, cooling limitations in the fuselage, and battery voltage. Instead of making promises that is only true in a laboratory, we decided to implement a temperature warning system that will inform the user if he needs to consider a better mounting position or a bit of cooling air.


See technical performance of the regulator here:  http://www.techgio.com/f3k-regulators/

Manual for the regulator:    F3K Buzzer mk4 Manual


In the box:

  • 1 pcs – F3K Buzzer mk4 – with 20cm wires (Wire and heat shrink color may differ from the shown pictures)
  • 1 pcs – Manual including signed test report from production with test of functionality

Shipping details:

  • Box size: 3 x 1.5 x 5 cm
  • Box weight 10 g
  • International shipping available (track and trace optional)
  • Shipping within 5 days if item is on stock.
  • Shipping time from 2 – 30 days depending on destination.


Additional information

Weight 4.5 g
Dimensions 2.2 × 1.1 × 1.0 cm

2 reviews for F3K Buzzer mk4 – BEC Regulator with audio feedback

  1. Peter

    Love the regulators, they makes life so much easier and you will never again stress wondering if there is enough power left in the battery while flying. Also Love the feature with bibs indicating roughly how much is left in the battery when you power it on.

  2. Ruben

    I´ve been using Techgio regulators from mrk1. Never had anyone failure due to this product.
    Mrk 4, featuring the audio signals, makes things so easy. Takes all guessing out the equation. 3 beeps – fly, 2 beeps – fly some more, 1 beep – time to charge, continuious beep – hold your horses – charge now!! Running these BEC´s in 4 DLG´s and counting.

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