Kit includes battery pack transformer and 9' connecting cable to connect to a user-supplied central 24V AC power supply (not included). Hardwire directly to user-supplied central 24V AC power supply to hide connecting cables in the wall for a professional look. Save time and money by connecting multiple dispensers to a single central transformer. No batteries to purchase or replace saves money and maintenance time and eliminates potential service interruptions due to low batteries. The kit will operate the dispenser just as if it were on batteries. There is no battery backup. Please consult a licensed electrician to determine how to install a 24VAC power source if you are unsure.