Sun Port&reg; Portable USB Powered Soldering Iron Pen 5V 8W Long Life Tip + Touch Switch Protective Cap Auto Shut Off (CPT-USBSL-5V) Fully Functioning USB powered soldering iron. Small and compact for portability. Rapid heat up and instant recovery. Heating up in 15 seconds. Cooling down in less than 30 seconds. If left unused for 25 seconds, this soldering iron will turn off automatically