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: Ultrasonic 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. LED IndicatorThis 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. USB Powered & Long-lasting LifeBuilt-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. Portable & LightweightThis device is in a small size, which is very comfortable to put in the pocket. It is equipped with a lanyard so that you can carry wherever you need. Wide ApplicationThis is a versatile trainer that can be used for dog training and dog repelling. Ideal choice for people who are not willing to be harassed by dogs for outdoor travel, bicycle, walking. UV Light FunctionUV lights can help detect pet's skin abnormalities. Easy OperationJust point the ultrasonic horn to the approaching animal, and press the switch button continuously for 2-3seconds. Specification: Color: Grey Main Material: Plastic Battery: 3.7V 350mah lithium Battery Charging Time: 2 hours Work Time: 5-10 days Control Distance: 5-10M Size: 10.6 * 2.4 * 2.4cm/4.17 * 0.95 * 0.95in Weight: 56g/0.12lb Package List: 1*Dog Repeller 1*Lanyard 1*USB Cable 1*Manual