The dog repeller equipped with advanced ultrasonic sound technology enhances the effect of driving away dogs at longer distances, protect you from dangerous dogs while walking or jogging. Super long standby for 30 days, up to 5 days in normal use. Features: ¡¾Ultrasonic Dog Repeller¡¿ The ultrasonic dog repeller will emit strong ultrasonic waves, which can only be heard by animals,the actual range can reach 5-10m. This dog repeller will help you drive away from the dog when you encounter a dog trying to attack your dog. ¡¾LED Indicator¡¿This dog trainer is equipped with a ultrasonic, power and charging LED indicator, remind you to charge at low battery. So you don’t have to worry that the dog repeller will suddenly run out of power. ¡¾USB Powered & Long-lasting Life¡¿Built-in 350 mAH battery, USB recharged with low energy consumption. Super long standby for 30 days, up to 5 days for normal use, 2 hours quick charging. ¡¾Portable & Lightweight¡¿This device is in a small size, which is