core bell wire used from transformer to shaker (and to bell
Required nominal input voltage: 8 to 20 volts AC (or DC)
(allowable peak input 40 volts) (required current 150mA i.e. low power)
The shaker uses only 150mA 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).