1. Material: ABS, nylon webbing 2. Function: collar, dog training device, barking control device 3. Power source: USB power supply/built-in battery power supply 4. Built-in battery: 300mAh lithium battery 5. The product has a built-in lithium battery, which can last for a long time 6. The neck strap size is 25-75 cm, suitable for most dogs 7. With waterproof function, please rest assured to use 8. Please turn off the power if not used for a long time
