1?��Large Capacity Battery: The 300mAh lithium battery has a large capacity design, which has a larger capacity than most products, and can be used for up to 1?3 days (60 days of long standby). 2?��Operation Without Remote Control: The dog bark control collar works in automatic mode through a combination of sound and vibration, without remote control. 3?��Adjustable and Durable: This vibrating and durable reflective nylon collar can be adjusted according to your dog's size. Suitable for all dogs from 6cm to 35cm in diameter. 4?��Smart Barking Collar: Only the barking of your pet can activate the vibration. Prevent other dogs from barking to activate the collar and cause harm to your dog. 5?��Adjustable Sensitivity: 7 sensitivity levels are provided for all possible barking volumes and different environments, ensuring that you can set the correct sensitivity. Select the mode (sound/vibration or sound+vibration) and sensitivity.