DC 4.5-40V To 5V 2A USB Charger DC-DC Step-down Buck Converter Voltmeter Module
$11.51
$21.18
Features : The voltmeter has an automatic calibration function. With reverse connection protection. With overheat protection and short circuit protection. High efficiency and low ripple. With USB power indicator light. Cars and Electric Bikes Motorcycle for voltage measurement and to charge the phone iPads, Mobile Phones Mp3 Devices
