I'm John Slade, profoundly deaf and original upstate NY. I own my designation the electronics diagram, building the electronics board with VP and Doorbell flasher unit (LED is very brighter, cool).

The unit is a creative with fancy, far-out, weird, basic, beautiful and more, more more...... Unlimited the units for many rooms you desire for how many units do you want.....When press the doorbell button at front door, all flashers will be fast flashed on the unit.

When ringing the VP, all flashers will be slow flashed on the unit. I have many demo on the display show via VP.