Features Ideal for traffic control, lifesaving operations, military training, sports competitions and training, and pet training. Suitable for referees, coaches, travelers, adventurers, guides, cheerleaders, lifeguards, teachers, transportation personnel, and seniors. Cylindrical mouth design for clear sound transmission over long distances, ensuring bility from afar. Compact size and lightweight construction with included lanyard for easy carrying and convenient neck hanging. Equipped with a side-mounted gear button offering 4 settings (OFF/1/2/3) and three selectable sound effects for versatile use. Specification Item Type: Electronic Whistle Material: ABS Color: As shown in picture Length: Approx. 15cm / 5.9in Weight: Approx. 81g / 2.9oz Battery: 4 x 1.5V CR2032 button battery (not included) How to Use Insert the battery (not included). Use the side gear button to select from 4 positions (OFF/1/2/3) and choose among three different whistle sounds. Press and hold the center sound button to activate the whistle. Package List 1 x Electronic Whistle (Battery Not Included) 1 x Lanyard 1 x Instruction Manual