describe This product is equipped with advanced ultrasonic technology, which improves the effect of tracking dogs over long distances, so you don't have to worry that you and your pet from being attacked by dogs. Feature: Wide Application: When you meet a dog trying to attack your dog, this dog repellent will help you to stay away from the dog. In addition, this product is equipped with advanced ultrasonic technology that dogs can hear, so it can be used as a dog trainer to help you train your dog. In addition, the product also has a high-brightness flashlight lighting function. 3-mode flashlight: This product has a powerful flashlight, which can realize three modes of constant light, strobe and SOS, which is convenient for taking your dog out for a walk at night. In addition, the flashlight has a smart light sensor that automatically adjusts the brightness according to the environment. Non-slip seeds, portable: The back of the dog repellent is designed with a non-slip groove, which can be better in your hand. What's more, it's a portable dog repellent that you can use both indoors and outdoors. LED Indicators: This dog repellent is equipped with LED indicators, you won't so you don't have to worry about the dog repeller suddenly running out of power. Rechargeable and Long Lifespan: 1200mAh battery with power saving function, standby time can be extended up to 140 days. Therefore, the product can be used for up to 20 days after a quick charge of about 2 hours. Specification: Product Name: Dog Repellent black Main material: plastic Battery: 3.7V 1200mah Li-polymer battery Charging time: 1-2 hours Working time: 15-20 days Control distance: 10 m Packaging information: Size: 14.5 x 3.5cm. Package List: 1 * Ultrasonic Dog Repeller