DROK LM2587 Auto Step Up Down Converter 24W 2A Boost Buck Module DC 3-35V to 1.2-30V Solar Energy Power Supply Charging Board Battery Voltage Regulator This is a non-isolated buck-boost converter module for converting 3-35V to 1.2-30V. Output voltage is adjustable, output current is 2A (when 9-35V input and 12V output, if 5V output can achieve 3). Max input current is 3.5A, when temperature exceeds 40 , please lower power or enhance cooling system. It has short circuit protection and small size makes it easy installed. It is designed for wide voltage range in order to power your electronic devices.