4.5V 0.5A AC/DC Adapter Power Supply for Home Electronics with 5.5×2.1mm Plug
Short circuit protection. 1 x 4.5V 0.5A 5.5x2.1mm AC Power Adapter. 5. 5mmx2.1mm (male) DC power plug. DC 4.5V 0.5A / 500mA. Battery Polarity Reversal. Over current protection. PRE-AUTHORIZATION MUST BE OBTAINED BEFORE SENDING ANY PRODUCT TO US.