Jefftron company was founded in 2011 as a manufacturer of electronic devices for airsoft electric guns.
The most advanced devices are Leviathan ETU (electronic trigger unit) with built-in wireless communication.
It adds new shooting modes, controls RoF, pre-cocking, active braking, virtual magazine, low battery indication, statistics...
The user controls everything via an application in the iOS or Android smartphone with real time response.
Leviathans are fully integrated inside the airsoft gearbox instead of the original trigger contacts.
These devices are made in Czech republic.