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. It's 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/5-18Cells NiMH/NiCa)
• Size: 43x17x7mm (LxWxH)
• Weight: 11g
• Ripple: less than 50mVp-p (@2A/12V input)