KOOCU V501 Constant Temperature Electric Soldering Iron for printed circuit PCB board. It is a portable, temp-control and temp adjustable soldering iron. Ceramic heater and three cores grounding wire ensure the safety of soldering works. Built-in temperature controlled circuit and rotational controller type thermoregulation, and easy to operate.Handgrip structure is designed according to the ergonomics, and comfortable to grip. Temperature controlled status is displayed by using high bright blue LED lamps. Both the heater and sensor feature PTC material, which helps rapid temperature rise and precise temperature control.The portable design facilitates carries of the product users.