Feature:

Input voltage: DC 4.5 ~ 40V.
Output voltage: 5V (when the input voltage is between 6.5V ~ 40V).
Output current: 2A.
The voltmeter has automatic calibration function.
With reverse connection protection.
With overheat protection and short circuit protection.

With USB power indicator light.
High efficiency and low ripple.
Application: can be used on car, electric bike, motorcycle for voltage measurement and to charge phone, iPad, Mp3 etc.
Size: 6 x 2cm(approx)

Package Included:

1 x DC 4.5-40V To 5V 2A USB Charger DC-DC Step-down Convert Voltmeter Module