The Dog Training Flag is a handy complementary accessory that works alongside wireless dog fences and training collars. Its key purpose is to assist in training dogs to recognize and familiarize themselves with the boundaries of an electric fence. Once the desired range is established using the wireless fence transmitter, it's straightforward to use. You simply test the distance between the transmitter and the collar, and then place the flags along the designated boundaries. These flags serve as markers that indicate the boundaries. When a dog wearing the receiver collar approaches the flag, it will emit a warning signal, effectively guiding the dog back to the safe zone. The package includes 20 flags in total - 10 pieces in yellow and 10 pieces in orange. Rest assured, we are committed to ensuring the utmost satisfaction of our customers. If you have any questions or concerns, our dedicated customer service team is always ready to assist you and strive to promptly resolve any issues to deliver exceptional satisfaction.