??- Ultrasonic sound based bark suppression、 does not deliver static shock like other models- Does not cause?harm to?the animal- Ultrasound only triggers when barking is detected- Effectively?reduces barking via Classical Learning pattern- Selectable ultrasound settings- Fastenable collar design- Weather proof- Powered by 2 x AG10 batteries (included)                                                                                                                                Dimensions: 2.52 in x 2.48 in x 0.47 in<br />Weight: 3.49 oz