Introducing the Classic PID Controller by Crossing, compatible with the full range of SZ Crossing coils! This is a regular PID controller with a live temperature display and screen on the front. The controller also allows the temperature to be adjusted in one Fahrenheit increments  giving you full control of of the temperature!  Specifications Live Temperature Display 1 Fahrenheit Resolution/Increments   Red Digital Display  Power Switch on Back UK 3-pin Plug Included (220v) 110v/220V Compatible Controller ROHS and CE Certified 1 Year Warranty Against Defects Also compatible with CH, Auber, DC and 710coils Pin 1 is AC live line, pin 2 is AC zero line, pin 3 is temp positive, then 4 is temp negative and pin 5 is ground We also have the Micro E-nail PID Controller which functions a little differently and a Dual Coil PID Controller.  These come to us bubble wrapped without instructions. As such they are shipped out bubble wrapped, without instructions! Simply turn on/off using the switch on the back and adjust the temperature with the buttons on the front.