Anti bark spray collar that is completely harmless.Has no secondary effects such as fear burns or pain.Each time the dog barks the collar releases a harmless and citronella spray that conditions the dog to stop barking.Spca approved.Collar Activation Unit 2.4 Oz Citronella Spray Cannister And BatteryDimensions (L x W x H):7.7 x 2.2 x 12.2