Tyson Xtra Capacitor Discharge UnitMeet the Tyson Xtra, it's got a knock out punch! Connect this unit to your points and it will deliver a knock out punch of energy from it's huge bank of capacitors ensuring your points switch reliably every time. This capacitor discharge unit (CDU) is our largest version with 4 huge capacitors and is suitable for larger layouts switching multiple point motor solenoids at once. For example route setting in a storage yard. Fitted with an automatic