The Package Includes: A Lanyard, An Ultrasonic Dog Whistle And A Training Rattle Is A Suit, There Are Two Sets Of Products, Each Set Weighs About 48 Es, The Suits Are All Black, The Whistle Is 0.7 Wide And 8 Long. The Lanyard Has A Total Length Of 50 And A Width Of 1.6 The Soundboard Has An Elastic Spiral Telephone Line, And The Other End Is A Key Ring. You Can Hang It On Your Pants And Bags To Avoid Losing It. In The Same Way, Lanyards Can Also Prevent Loss Of The Whistle. When Training Dogs, It Is More Convenient For You To Free Your Hands To Interact With The Dog. Effective Pet Training: Dog Clicker With Big Button For Easy Click And Loud Sound, Help To Train Basic Dog Obedience And Tricks, While Correcting Bad Behavior. Teach Things Like Sit, Fetch, Shake, Lay Down And Roll Over The Whistle Can Be Set To Produce Different Sound Frequencies Corresponding To Different Passwords. This Product Is Suitable For Dogs Of All Ages And Breeds. Instructions: Loosen The Sonic Adjustment Screw. While Blowing Air From The Air Inlet, Turn The Adjustment Lever To The Height And Tighten The Sound Wave Adjustment Screw.