ITEM NAME:2Pcs USB female to 5.5mm x 2.1mm female DC power converter charger adapter W Bj.USB 2.0 A Type female To 5.5x2.1mm DC power Female. Provides 5V DC from USB,Power devices from a USB to 5521 port. For small electronics and devices which use a 5.5 2.1mm barrel jack for a power connector.
