PUSHBUTTON TRANSMITTERS > To Send ''On'' Signal Only   ''On-Only'' Pushbutton Transmitter - Large Frame This batteryless Transmitter emits ONLY an "On" signal. It is slightly harder to push than the standard range transmitter, but provides an increased range of 50-70 feet through walls, obstacles, floors, etc. Range can be extended dramatically using the "Range Extender".  Applications include "call" buttons, "announce" buttons for waiting rooms in doctors' offices or "attention needed" buttons in offices, factories, warehouses, etc.  Installations using one or more On/Call Transmitters $ 38.99               More Information ''On-Only'' Pushbutton Transmitter - Small Frame This batteryless Transmitter emits ONLY an "On" signal. It is slightly harder to push than the standard range transmitter, but provides an increased range of 50-70 feet through walls, obstacles, floors, etc. Range can be extended dramatically using the "Range Extender".  Applications include "call" buttons, "announce" buttons for waiting rooms in doctors' offices or "attention needed" buttons in offices, factories, warehouses, etc.  Installations using one or more On/Call Transmitters $ 37.99               More Information