Blue anti-barking device for dogs, with adjustable settings. - Color: Blue - Settings: OFF, L, M, H - Design: Dog illustration and bone mark - Strap Material: Nylon - Function: Anti-barking Thank you for viewing. Functionality has not been tested. Please understand that there may be some errors due to amateur measurements. * Although we handle the products with care, there may be oversight of minor stains or scratches due to amateur inspection. Please purchase only after understanding that these are used items. Those who are sensitive or seeking perfection should refrain from purchasing.