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 away dogs from up to 8 meters with a simple press of a button, ensuring and reliability in close encounters.Long-lasting Type-C Charging: Featuring a built-in rechargeable battery and Type-C charging, this device offers extended usage time, removing worries about frequent recharging.Compact and Portable Design: The mini size makes it easy to carry and convenient to store, while the included lanyard ensures it/u2019s always within reach, ideal for everyday use.User-Friendly Minimalist Design: With its straightforward one-button operation, this device is accessible for all ages, making it suitable for both children and the elderly to use confidently.Product Name:Barking Deterrent DeviceSize:3x2.6x5cmBattery:3.7V 300mAhEffective distance: 8 meters awayAudio frequency: 30000-40000HzTarget audience:DogsColour:BlackMaterial:PlasticPackage Contents:1 * Barking Deterrent Device1 * Lanyard1 * Data cable1 * English instruction manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.