Place the handle in the charger that is plugged into a live socket.
Press the Dual Speed Control button briefly and note which LED lights up.
Press and hold the Daul Speed Control button. Continue to hold the button while the LED's slowly cycle though the timing intercal setting options: Green LED in postion 4: Programmable Quadpacer active (factory defualt setting). Green LED in top (5th) postion: 2 1/2 Minute setting - the Programmable Quadpacer active with an additional 30-second timing interval.
To program the desired setting, release the button when the LED corresponding to your choice lights up.