Product Specifications: Dimensions: 9.5 x 4.2 x 3.3 cm Color: Dark Gray Material: ABSPackage Contents: 1 x Dog Repellent - Effective Sonic Bark DeterrentProduct Features: Updated Dog Behavior Control Device: Equipped with two ultrasonic frequency modes - Variable Frequency Mode and Fixed Frequency Mode - to effectively capture the dog’s attention and correct undesirable behaviors. Safe and Humane: This device promotes safe and humane animal training, helping to correct bad behaviors without causing harm. Easy to Use: Simply press the button to activate. Ideal for training your dog to stop barking, digging, fighting, or eating unsafe food. LED Indicator: The LED indicator lights up green when the device is emitting ultrasonic waves, ensuring you know when it’s in operation. Portable Design: Lightweight and handheld, this device can be easily carried in your pocket or bag, making it suitable for both indoor and outdoor use. It also deters other dogs from approaching during activities like jogging or walking. Long Control Range: The ultrasonic machine is effective within a range of 16.4 feet. For best results, use at a closer range. USB Charging: The built-in 1200mAh battery charges fully in 5 hours, providing up to 15 days of regular use. Universal Fit: Suitable for most dog breeds and sizes. However, it is not recommended for dogs under 6 months old, aggressive dogs, or dogs with hearing issues. Note: Avoid using in noisy environments for optimal results