Set enables airsofter to use Bosch Blue, Bosch Green, Dremel and maybe others batteries from power drill or screwdriver.
Batteries are 12 or 10.8 volts Li-Ion, thats suitable for most airsoft AEGs.
Set gives unique ability to get ready for game in 1 second, because battery just clicks in, no need to mess with wires.
Developed for Ares M4 45 PISTOL- S CLASS-S, but should work with any double-rod stock for airsoft M4.
There are Production and assembly manual PDF inside.
Photos and renders dont show real Shapeways quality which is awesome.