DC-DC Step Down Module Two-wire Voltmeter 5 V USB Charger or Power Supply Input 4.5V-40V Output 5V/2A
Input voltage: DC 6.5 ~ 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.