Wiring Diagram
Standard 2 core bell wire used from transformer to shaker (and to bell push).

Required nominal input voltage: 8 to 16 volts AC (or DC)

(allowable peak input 40 volts) (required current 200mA   i.e. low power)

The shaker uses only 200mA and therefore can normally be added to a system with little effect on existing equipment.

The highly flexible input requirement allows use with most bell transformers that we have come across (including American transformers).