General description Ultrasonic Dog Repeller is a high-power device designed to deter barking in dogs using ultrasonic sound waves. It operates at a frequency of 25000Hz and features a sound wave drive, laser training option, and USB charging capability. This device is suitable for dogs over 6 months and under 8 years old, ensuring it does not harm them while effectively training them. Technical specifications Frequency: 25000Hz Effective distance: 5 meters (barrier-free) Battery voltage: 3.7V Battery capacity: 500mAh Charging voltage: DC5V Charging interface: T-C Material: ABS Color: Black Measurement allowed error: +/- 1-3cm Other information Package Contents: 1 x Repeller Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.