Use This For Equalization

the 400 watt one matches the ebay 400w
all three look to be the same thing, sold by three different sellers
only the first one by DROK has the sticker removed from the side
none of them say BUCK..they all say boost
only the ebay seller actually spells it out in the spec list

according to the ebay seller boost only , No buck

red highlight is mine

Advanced microprocessor,
Use button precisely regulated output voltage, current
4 bit high brightness LED, real-time display output voltage, current , you can manually switch shown , can also be set auto rotate

Specification:

Input voltage : 6V -40V

Input Current: 15A(max)

Output voltage : 8V -80V(adjustable)

Output power:400W(max)

Output current: maximum output current of 10A ( adjustable )

Output power: the effective power P = input voltage V * 10A

Conversion efficiency: up to 95% ( input voltage, current; output voltage and current impact of conversion efficiency )

Short circuit protection : Fuse

Size :85*75*64mm

Weight :295g

Applications:

1.DIY an output adjustable power supply, only need to enter the access 6v,12V.24v .36v power supply or battery can be (14V-80V) free continuous adjustment,
but the output voltage can not be lower than the input voltage.

2 universal car laptop power supply. Input connected to 12V power supply, the output voltage can be adjusted to the notebook need work.

3.Boost charger with 12V power supply is higher than 12V battery charging, for example, 24V battery and charging current can be adjusted.

4.For electronic equipment power supply, as long as the voltage regulator to the required voltage and current does not exceed the rated current is normal.

Package
100% Brand New