This is for 2 bec modules

5 Volt Mini Buck Converter 5V-30V In 5V Out 6s Lipo Capable! Non Adjustable.

3A Mini DC-DC Buck Step Down Converter Board Module 5V-30V to 5V DC to DC Voltage Regulator PCB Board Power Buck Module

Features

l High reliability

l High efficiency up to 96%

l Small size, easy to assemble

l Long life

l Ultra-low input voltage start

l Input undervoltage protection

l Input overvoltage protection

■ Size 17.5mm*12mm*4.3mm (length*width*height)

Weight: approximately 1.5 grams