This ubec is an external switching mode dc-dc regulator; it draws dc voltage from 2-6s lipo battery, drops it to a voltage level that is suitable for your receivers and other electronic devices, and keeps providing the stable current output of 3amp. Its compatible with different brands of escs. Spec check: output voltage/current: 5v@3a / 6v@3a (adjust via jumper cap) input voltage: 5. 5-26v (2-6s lipo/5-18 cells nimh/nica) size: 43x17x7mm (lxwxh) weight: 11g ripple: less than 50mvp-p (@2a/12v input) (hw86010010)