Features 1、2 Modes: This collar can provide effective sounds (buzzers) and 7 safe vibration modes, you can use this training collar to correct your dog's behavior. 2、300mAh Battery: Dog barking collar has a built in 300mAh lithium battery, with a large capacity design, which can be used for up to 1‑3 days (up to 60 days of long standby). 3、Good Performance: The pet training collar uses a USB charging plug, built in microphone trigger, sensitivity adjustment, practical dog training supplies. 4、Adjustable: Dog collar nylon strap, adjustable collar length 6‑36cm/2.3‑14.1in, easy to adjust to a suitable neck circumference, suitable for all sizes of dogs. 5、Waterproof: Life waterproof bark control collar can be used safely in any weather conditions indoors and outdoors, don't worry about the collar being damaged. Specifications: Item Type: Dog Barking Collar Material: Plastic + Nylon Product Size: Approx. 6.5 x 2.5 x 3.5cm / 2.6 x 1 x 1.4in Battery Type: Lithium Battery (Shipped with Built in Battery) Battery Capacity: 300mAh Charging Method: USB Charging Adjustable Range of Collar: Approx. 6-36cm / 2.3-14.1in Waterproof Grade: Life Waterproof, Can Be Rainproof, Can Not Be Soaked in Water Suitable Pet Type: Large, Medium and Small Dogs Product Function: Warning Sound + Vibration + Sensitivity Adjustment Package List 1 x Dog Barking Collar 1 x USB Charging Cable 1 x Conductive Measuring Lamp 1 x English Manual