4UAD Smart Airsoft's latest ASMR sessions covers the Arcturus AK-12 With Jefftron ETU & ADV brushless motor. The AK12 is taken apart to remove the gearbox. and gets fitted with the Jefftron ETU and follow the Jefftron Sticker Tips. Next, a test of the sensors and shim the gears before installing the piston and closing the box followed by the installation of the ADV Brushless Motor and pair the selector. From there, it's the assembly of the rail and barrel before conducting a final test and mag dump.

Time for another ASMR session with 4UAD Smart Airsoft as they put together an upgraded SIG 552 AEG from ICS Airsoft by equipping with a DV Brushless AEG  motor and adding a Jefftron ETU. As for the suppressor mounted, it is the RGW suppressor. Watch carefully the installation which includes a mag dump to check how it performs. Just try to stay awake as ASMRs usually lull us to sleep.

WYSHTECH Airsoft shows you how to adjust your KWA 2.5+ or VM4 gearbox so that it can work with a Jefftron Leviathan. The Leviathan - V2 optical is a high-tech ETU (electronic trigger unit) that enhances your shooting experience. It uses both optical and switch sensors to detect the trigger position and control the gearbox, making it more responsive and durable than traditional ETUs.

Sniper Airsoft Supply show Lancer Tactical AEGs thatt are equipped with the Jefftron Leviathan that they have in stock... "Lancer Tactical is a big name in airsoft. Lancer Tactical Airsoft weapons are particularly suitable for beginners. We have the Strident, Blackbird and Vigor now with Leviathan Internals from Jefftron! Super fast triggering is possible, only your own finger slows you down.

Reapers Airsoft combs through the Jefftron Leviathan V2 Optical MOSFET with Real Feel Speed Trigger (RFST) in this video review... "Hi! Hi! In this video we install the Jefftron Leviathan V2 Optical with Real Feel Speed ​​Trigger and take a look at the app in detail. The EFCS is installed in my Burk BR10 AEG."

Reapers Airsoft does a review of the ASG CZ Scorpion EVO3 A1 S-AEG that comes with the Jefftron Leviathan EFCS. The S-AEG means it is a semi-auto AEG to meet airsoft regulations in Germany.. "Hi folks, today we're going to take a look at the slightly older CZ Scorpion EVO 3 A1 in the S-AEG version from ASG."

Robin Bensten shows you how to install the Jefftron Leviathan Smart MOSEFT on the ICS CXP-MARS AEG... "In this instructional video, i am opening up the ICS CXP M.A.R.S rifle to change out the stock mosfet with the LEVIATHAN smart mosfet by Jefftron. Of course this will transfer to other rifles as well, but this how to was created to guide thos with the ICS split gearbox. Hopefully this will shed some light on the mather."

SOCOM Tactical show the MOSFETS from Jefftron that they have available at their online store... "JeffTron company was founded in 2011 as a manufacturer of electronic devices for all types of airsoft guns. Based in the Czech republic, JeffTron produce some of the most unique airsoft MOSFETs out on the market.

Another comprehensive review by Reapers Airsoft, this time covering the Leviathan EFCS MOSFET from Jefftron rather than an airsoft gun... "Hi, Today we look at the Jefftron Leviathan EFCS which is adjustable via Bluetooth. Thanks to the slim design, it fits into most gearbox shells without post-processing and makes a very good impression in terms of quality. * UPDATE * - Maximum Amps: 40A for 20 sec. 120A for 1 sec. Unfortunately, I did not have this data at the time of the video yet."

Gunfire shows you how to program this MOSFET from Jefftron, which they are carrying at their online store including cabling for their various modules, in this video... "A quick, intense and thorough guide on programming of Jefftron MOSFET modules. The modules themselves, as well as accessories from Jefftron, you can find here."