Bark Collar Spray Petsafe Bark training requires consistency. The PetSafe Spray Bark Collar corrects your dog's barking without a remote. This spray bark collar detects your dog's barking and sprays him to distract him from the mailman or the neighbor's cat. The dual detection technology in this collar must detect both vibration and sound before spraying. Your dog will learn to associate barking with a correction and adjust his behaviour within 2 weeks. You, your pet, and your mailman win. PetSafe keeps pets safe, healthy, and happy. Characteristics Water resistant collar Recharges in 2 hours (with USB charger) and lasts 40 hours. Includes scented, unscented, and citronella spray cartridges. Each recyclable cartridge holds 35 sprays. Adjusts to accommodate necks up to 68 cm for dogs 3.6 kg and higher. Contains USB Charging Spray Bark Collar Quick Start Guide for Citronella and Unscented Spray Cartridges