Hygienic No-Touch Operation : Say goodbye to mouth contact with our electronic whistle. Perfect for coaches, referees, and teachers who value hygiene in their equipment. Portable & Durable : Made from ABS materials plus flame retardant materials, this whistle is both safe and sturdy. Its compact design fits perfectly in your pocket or backpack. Efficient Dog Bark Deterrent : Utilize the ultrasonic wave feature to manage your dog's barking effectively. An essential tool for pet owners and trainers alike. Three Distinct Tones : Choose from three volume levels to suit various environments and needs. Whether it's a loud call for attention or a softer tone for indoor settings, this whistle has you covered. Rechargeable & Long Lasting : Equipped with a rechargeable polymer cell, this whistle offers hours of continuous use without needing to replace batteries. Experience the ultimate in functionality and safety with our Electronic Whistle, designed for coaches, referees, and enthusiasts who demand reliability. The streamlined design ensures a comfortable grip and easy one-handed operation, making it perfect for a wide range of activities. With adjustable volume and ultrasonic capabilities, it's versatile enough for training pets, managing sports events, and signaling in emergencies. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.