AETERTEK Pet Dog Shock Collar E Electric Remote Training Collars Bark Collar No Stop Barking Device for Small Dogs AT-211 Updated Designed for small dogs or large cat weighting from 10 lbs to 50 lbs. Multi-functional collar:Vibration, Beep, 10 levels of Shock. LCD display remote for easy control. use the most advanced design, electromagnetic induction switch solution, on the power ON/OFF switch to ensure unlimited accurate switch, more convenient and reliable. Rechargeable remote control and receiver collar Adjustable TPU strap length from 2" to 9"