Fangrui Product Details Effective Barking Deterrent - This Ultrasonic Dog Whistle Serves As An Anti-barking Device, Successfully Controlling Your Pets Excessive Barking Behavior And Creating A Quieter Environment . Dual Head Design - Featuring A Double Head And Double Speaker For A Coverage, This Training Device Ensures Effective Training And Improved Behavior For Your Pet. Safe Humane - Our Ultrasonic Dog Barking Deterrent Is A Non-invasive And Humane Way To Train Your Dogs It Doesnt Cause Any Harm Or Discomfort To Your Pet, Ensuring A Healthy Training Method. Easy To Use - Our Device Is Designed For Simplicity And Convenience Versatile Training Device - Apart From Barking Control, This Ultrasonic Whistle Can Also Aid In Behavior Training, Helping You Correct Other Unwanted Habits Of Your Furry Companion And Improve Overall Behavior. Color: Black Material: Plastic Package Contents: 1 X Dog Repellent 1 X Battery Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays M