Humane Automatic Ultrasonic Barking Control Device This barking control device with the latest dog barking sensor system can catch dog bark accurately. No electric shock, No irritating smell, No Beep Voice, safe for pets and harmless for humans, thebarking deterrent device emits the ultrasound automatically to stop dogs barking, perfect for keeping your dogs silent when you leave dogs alone, creating a peace department for your families and neighbours. Stop Dogs Barking Indoor & Outdoor This barking control device with a 33Ft extensive effect working range, perfect for stopping neighbours and homeless dogs barking outdoor. Small size and the lightweight anti barking device can be set on a deskor shelf easily to prevent your dogs from barking at home or hung on a tree, wall, fence post under waterproof cover to stop other dogs barking. Rechargeable Anti Barking Device dog barking control device equipped with a high-capacity rechargeable battery, just need 2 hours full charge can standby by 30 days. This long-time standby dog barking deterrent device is suitable for use at nightfor decreasing dogs' excessive and noisy barking to help you sleep better, saving your time and cost on replacing batteries. Easily use anti barking device with royal serviceThe barking control device with LED indicator can help you understand device on working or battery low. When working on 3 different levels, the light will flash red every 6s; the Blue light stays on3s when the sonic bark deterrent is triggered by barking; the Blue light will flash when in low power. Any problem with our anti barking device, please feel free to contact us, we will reply within 24 hours.