5V input via USB Type C USB connector Comes assembled and ready to rock out of the box 0.1' Breakout pads with 5V, D- and D+ data lines, GND and VBAT 100mA charge current, adjustable to 500mA by soldering a jumper closed For charging single Lithium Ion/Lithium Polymer 3.7/4.2v batteries (not for older 3.6/4.1v cells)