Dog Whistle Ultrasonic Dog Training Whistle for Recall Tricks Stops Barking Product Information 1. Teaching your dog to follow your commands 2. Pet training whistle suitable for all kinds of family pet dog 3. Small and lightweight, you can put it on a keychain or pocket 4. The lanyard feels great around your neck during your training session with your little puppy or grown up dog NOTICE: It requires multiple training for your dog to listen to your commands Please be patient Package Include: 2 x dog Training Whistle Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)