Gentle & Effective Dog Training: Train your dog with kindness. This device helps correct unwanted behaviors safely and humanely, encouraging good habits without stress or harm. It promotes positive interaction between you and your pet and supports a happier, calmer, well-behaved family dog. Ultrasonic Dog Training Device: Equipped with dual ultrasonic frequencies (20–30 kHz variable and 25 kHz fixed), this upgraded trainer works up to 30 ft. The enhanced 20–30 kHz mode includes a flashing indicator light. Multiple modes help address different behaviors, offering safe, non-stressful everyday training support. Easy to Use: This handheld trainer combines ultrasonic modes, a flashlight, and a clear display screen. Press and hold the button to switch between two ultrasonic modes. The bright flashlight supports night use, and the HD screen shows working mode and battery level at a glance. Safe and Humane: Suitable for dogs 6 months to 8 years without hearing issues. Not recommended for pets with known neurological conditions such as epilepsy or seizures. For safety protection, the device automatically shuts off after 10 seconds of continuous use. Convenient Design: Compact and lightweight, it fits easily into a pocket or bag and is comfortable to hold. Ideal for indoor and outdoor training scenarios such as walks, parks, travel, and daily home use. Dog Barking Deterrent Device, Anti Bark Control for Dogs, Rechargeable Indoor/Outdoor Ultrasonic Trainer – Effective for Small, Medium, Large Dogs