Compared with traditional whistles, this electronic whistle eliminates the need for mouth contact. Simply press the sound button to produce a loud and clear sound, saving effort and reducing saliva transmission between users. Ideal for referees, coaches, PE teachers, marine personnel, outdoor camping, sports competitions, traffic management, pet training, and personal emergency use. This electronic whistle features 3 distinct high-volume tones, each delivering 120–150 dB of sound output. Made from high-quality ABS plastic, it is durable and free from harmful substances. It includes a built-in LED light for visibility in low-light conditions and supports USB direct charging—offering up to 4 hours of continuous operation per charge. This eliminates the need for disposable batteries and reduces long-term costs. Ergonomically designed for one-handed operation, it includes a detachable lanyard for easy carrying. The lanyard can be attached to backpacks, life jackets, kayaks, belts, shoulder straps, or pockets for quick access during emergencies. Color: Black Material: ABS Plastic Package Includes: - 3 × Electronic Whistles - 3 × USB Charging Cables (color and style may vary) - 3 × Lanyards (color and style may vary) Note: Color appearance may vary slightly due to screen settings and lighting. Dimensions may vary by ±1–3 cm.