1. The Dazer III ultrasonic device is a repellent for aggressive dogs, featuring an upgraded 3.0 version with dual ultrasonic speakers.<br> 2. It stands as the most powerful deterrent on the market due to its ultrasonic range and dB pressure, which remains inaudible to humans. The approximate range is around 10 meters, with a maximum effective range of 6 meters at 100% intensity.<br> 3. Now, you can jog, run, or bike along roads or mountain trails without fear of dogs approaching. When the ultrasonic button is pressed, the device vibrates to confirm activation.<br> 4. It includes USB charging with a low battery indicator. A full charge can last up to 30 days. The Dazer III is crafted from lightweight, impactresistant materials.<br> 5. Using the Dazer III is simplejust press one of the two buttons and aim at the dog. Upon detecting the ultrasonic waves, the dog will stop and avoid approaching to prevent contact.<br> 6. The Dazer III offers three modes:<br> **Ultrasound**: Choose from three frequency types<br> *Stable*: 25 kHz waves for prevention.<br> *Irregular*: Waves fluctuating between 2025 kHz for repelling.<br> *Wellig*: Sharptipped waves for dog training.<br> **Ultrasound Flashlight**: Combine ultrasonic frequencies with a flashing light.<br> **Annoying Sounds**: Emits irritating noises to deter dogs.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin