1. High-Performance Whistle : The included metal whistle produces a sharp, high-decibel sound that effectively cuts through surrounding noise. Its volume ensures it can be heard clearly across the field, making it an essential tool for every referee. 2. Durable Card Holder : The yellow card comes with a PU leather cover that features reinforced edges to prevent tearing and ensure long-lasting use. It is specifically designed for the convenient storage of red and yellow cards, along with space for a pen and paper for easy note-taking. 3. Comprehensive Referee Set : This all-in-one referee kit includes two referee flags (16.93 x 13.39 inches flag area; 19.69-inch pole), a metal whistle, a set of yellow cards (with random pen color), a blue throwing tool, two armbands, and a scoreboard—everything needed for effective game management. 4. Convenient Lanyard Design : The whistle comes with a handy lanyard, allowing it to be easily attached to key rings or worn around the neck. This feature prevents loss during matches or training sessions, ensuring it is always within reach. Use Scenarios : - Ideal for referees officiating soccer, basketball, or other team sports where clear communication is crucial. - Perfect for coaching staff during training sessions, allowing for quick signaling and organization on the field. - Essential for sports events, helping maintain order and facilitate effective game management across various sports. This professional referee set is designed for reliability and performance, ensuring you are fully equipped to make your games run smoothly and effectively.