Thank you for viewing. This is a smart anti-bark collar for dogs. It's an automatic detection type that activates in response to your dog's barking. It's USB rechargeable, eliminating the need for battery replacements, and comes with instructions, so it's easy to use even for beginners. 【Product Contents】 ・Main unit ・Collar belt ・USB charging cable ・Instruction manual ・Outer box 【Features】 ・Automatically detects barking ・Multiple modes / Sensitivity adjustable ・USB rechargeable ・Suitable for small to medium-sized dogs ・Lightweight design 【Condition】 ・Brand new, unused ・Stored at home Recommended for those looking for anti-barking measures and training.