Output: plug in USB or micro USB can easily output adjustable voltage from 1V to 24V and the power is 3W Data storage: automatically save the state before the power failure, the output data will not be lost. SHAHIDEER MT3608 Step Up Boost Power Converter Módulo de Avance con Micro USB DC-DC 2A Max 2V... DC-DC 5V - 3.5V / 12V USB lépéses fel/le tápegység modul, állítható Voltage Regulator Buck Converter ZkeeShop 2Pcs Buck Converter Module 12V To 5V 5A USB Voltage Convertisseur Buck Boost Usb