Click on the following link for product video demo presentation. https://youtu.be/4tkCOnSQdXU

This is a very Useful must have device, its inut range is 9V to 28V DC which can be a Car battery 12V, 24V battery or even a solar panel DC, it has four USB output ort which can charge 4 USB devices at a time, total output current is also high 4.8A, an outstanding device which converts solar, car and regular battery power into 5V 4.8A. this device can also be easily install in car dashboard.

For demo video click here: https://www.youtube.com/watch?v=JvBxapEltds

Features:
USB Step-down Power Supply Module New DC 9VDC 40VDC to 5V 4.8A

9V to 40V Ability to Intelligently distribute Current
At Least Input voltage 7-30V  Volts required is required for output 5V 4.8A

Smart Intelligent IC Chipset: Output short Circuit and overload Protection

It's all adopt tps40057 chip and is the only safe and efficient.
40057 chip protection mechanism, the output voltage is zero.
Efficient, synchronous rectifier way, efficiency is as high as 94% above.
All copper plate and excellent performance, four USB is all of brass.
 
Specifications:
Name:USB Step-down Power Supply
Material:Tps40057 chip and copper
Size:4.8*3.6cm
Current:5 A maximum
Function:

All equipment for 5v, appliances within 25 w, such as MP3, MP4,'t a MP5, cell phone, tablet, navigation,
Vehicle traveling data recorder, and a bluetooth device, can use at the same time,?also be used on the LED power supply.
The power connect between the cathode and anode, input is completed,
There will be a voltage output.And with two USB output will be normal work, provide standard 5 v,
Used for all kinds of electrical appliances
USB socket provide standard 5 v voltage, directly ?USB plug in the USB socket
,
then can be used.
It's all adopt tps40057 chip and is the only safe and efficient.
40057 chip protection mechanism, the output voltage is zero.
Efficient, synchronous rectifier way, efficiency is as high as 94% above.
All copper plate and excellent performance, four USB is all of brass.