2-In-1 ClickerClicker Training Uses A Consistent Cue To Mark Desired Behavior In Real Time, Then Motivates And Rewards After That Cue. Dogs Know Exactly What Actions Generate Clicks And Rewards, And They Eagerly Learn New Behaviors.Easy Training: It Is A Good Tool That Allows You To Teach The Dog To Obey And Learn Skills. Basic Skills. This Ultrasonic Training Tool Can Teach Your Dog Unlimited Commands, Such As Remember, Sit, Come, Stop, Stop And Stop Barking.PatientPlease Note Your Dog Needs To Be Trained Several Times To Understand His Commands. This Article Does Not Oblige Your Dog To Immediately Obey Your Commands. Be Patient. Don'T Push It.Sales ServiceIf For Any Reason You Are Not Completely Satisfied With Your Purchase, If It Breaks, Is Damaged In Shipping, Or Even Changes Of Opinion, Let Us Know And We Will Deal With It Quickly!NotePlease Keep Consistent Whistle Commands, And If It Reacts Positively, It Should Reward Your Dog. Training Is Best Between 3 And 7 Months.