Referee Whistle

News 2024-02-05:My newest design, a Long Range Dog Whistle at 6200 Hz. Please download here.News 2024-01-21:I designed an Ultrasonic Dog Whistle with a very high pitch of 23 kHz, which you can download here.Description:Let me introduce my newest whistle design, the Optimized Referee Whistle.What makes this whistle outstanding:extremely loud and far-reaching,piercing triple tone,high side walls for perfect finger grip,mouth grip for hands-free whistling,large mounting hole for lanyard cord,almost