DC 4.5-40V To 5V 2A USB Charger DC-DC Step-down Buck Converter Voltmeter Module
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.