Barks are detected via an internal microphone and each bark triggers a mist of spray, which is unpleasant, but harmless for your dog. Choose from lemon or lavender scents. Each can contains about 25 sprays. The collar is water-resistant and the long-life battery will last for approximately 3 years of use or 4 years in stand-by.This Ultra lightweight collar weighs only 1.48 ounces and is automatic no adjustment required . Includes one can of spray 2.63 fl oz in your choice of scent. The turquoise nylon strap is adjustable to fit neck sizes from 5.9 to 21.6. Features n Weight 1.48 oz battery included n Dimensions 2.36 x 1.26 x 1.26n Power 1 3.6-V long-life battery already fitted in the collar when you purchase it n Turquoise nylon strap length 2.1 ft / width 0.6 €“ adjustable for neck sizes from 5.88 to 21Item Details n Dimensions 2.36 x 1.26 x 1.26n Color Black