Bark Buster Silent Dog Silencer Ultrasonic Alarm Train your dog to kick the barking habit with this humane behavioral modification device. Bark Buster emits an ultrasonic pulse when your pup barks, but to human beings, it's completely silent. PCB, plastic; requires 1 "9V" batteries (not incl.). 5"H. Hand hold or wall mount. 21283 We accept paypal only. We have been very happy with the service and protection that they offer us and our customers. I only ship to USA and Canada. We do include Alaska and Hawaii. We do combine shipping. We do accept returns within 14 days of purchase. We do not pay for return shipping unless item is defective. We are a happily married couple from Tennessee. We offer many unique items for your home. We enjoy spending time with our family and friends. We can be reached through the ebay message center and we try to respond quickly to all inquiries.