With the Hobbywing UBEC 25A HV you supply your receiving system safely and efficiently with power from a connected LiPo battery from 3 - 18s. A great advantage of the Hobbywing UBEC is the possibility of selecting the output voltage to the servos used. This is adjustable in four steps from 5.2V up to 8.4V. For optimal security of the power supply there is the possibility to connect an external, additional backup battery. This automatically takes over the supply if the main battery should be empty or defective. This powerful UBEC is used in large helicopters and wing models with correspondingly powerful servos and corresponding number. Features: Switching BEC with an efficiency of over 90% 4-fold adjustable output voltage Protection functions for overcurrent, short circuit, overheating, overvoltage and undervoltage Maximum safety through backup function External on / off switch Metal housing LED status display Technical data: Input voltage: 3-18s LiPo Input voltage backup: 1-2s LiPo Output voltage: 5.2V / 6.0V / 7.4V / 8.4V Output current continuous/short: 25A / 50A Weight: 74g Dimensions: 55x40.2x17.6mm.