Dog Silencer Max fixed the issue in two days.

Neighbor has an elevated deck facing our house that their dogs would use as a performance stage to direct their unhappiness of being left alone by barking at the sky for hours. Dog Silencer Max fixed the issue in two days. Love the remote control to further modify their behavior by zapping them [note that this device does not literally zap the dogs] whenever they come out, which is rare now, except to relieve themselves. We highly recommend this device.

Sam
Colorado United States