1. Advanced Repelling Technology Uses cuttingedge 20 30KHz ultrasonic technology, inaudible to humans but effectively prevents dogs from approaching, ly deters unfriendly canines without harm 2. Dual Mode Design Fixed frequency mode for everyday deterrence, sweep frequency mode for more aggressive dogs, meeting various situation needs 3. Multifunctional LED Light Three lighting modes (constant/strobe/off), provides illumination at night, strobe mode enhances deterrent effect 4. Weighs only 93 grams, comes with belt clip, effortless to carry, essential equipment for outdoor activities 5. Widely Applicable Provides effective protection for mail carriers, delivery personnel, joggers, dog walkers, etc., with effective range up to 10 meters 6. Onebutton Operation Ergonomic design, all functions operable with one hand, quick response in emergency situations 7. Rechargeable Design Builtin lithium battery(800MAh), up to 2 hours of continuous use on a single charge, with power display and low battery reminder