Anti-barking barking deviceMaterial: ABS plastic SECURE AND HUMAN: No harm to your dog because this device is gentle on your pet by preventing it from shock or other physical damage. Petic collars do not use spray technology like Citronella or similar spray collars, as in some cases they can cause allergies. So we designed a painless solution based on sound and vibration technology to keep your dog safe! PERFECT QUALITY FOR ANY SIZE: The bark control collar is designed for