Ultrasonic Anti Bark Device Dog Barking Control Stop Repeller Silencer Trainer Features: Powerful Ultrasonic Technology: Equipped with high-frequency ultrasound ranging from 30,000Hz to 40,000Hz, this device effectively stimulates the hearing of aggressive dogs, creating a deterrent effect. Easy One-Button Operation: Effortlessly drive dogs from up to 16.4 ft with a simple press of a button, ensuring safety and reliability in close encounters. Long-Lasting Type-C Charging: With a built-in rechargeable battery and Type-C charging, this device offers a long use time, removing the worries of frequent charging. Compact and Portable Design: The mini size makes it easy to carry and convenient to store, while the included lanyard ensures it/u2019s always at hand, ideal for daily use. Easy-to-Use Minimalist Design: With its simple one-button operation, this device is accessible to all ages, making it suitable for both children and the elderly to use with confidence. Specification: Product Name: Barking Deterrent Device Color: Black/Yellow/Blue Materials: Plastic Size: 60.2*31.6mm Battery: 3.7V 300mAh Effective Distance: 16.4 ft away Audio Frequency: 30000-40000Hz Target Audience: Dogs Package include: 1 * Barking Deterrent Device Note: Please allow minor errors due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item colour displayed in photos may be showing slightly different from the real object. Please take the real one as standard.