Hiado Spray Anti-Bark collar for Dogs Kit Includes: collar, spray device, Lemon Oil spray refill, battery, and training manual Extremely Safe,the spray has no CFC, Effective and Humane! Adjustable collar fits dogs, neck: 15cm-78cm/ 5.9"-30.7" Releases a short burst of Lemon Oil spray when your dog barks - Super Quick Results! Long battery life, 2-4 months