Acme whistles acme thunderer 660 whistle blue possibly the biggest selling whistle of all time. Possibly the biggest selling whistle of all time, the acme thunderer 660 is easy to blow, small, and delivers a high-pitched 117 dba blast that cuts through the noisiest pool environment. Favoured in colder settings where metal might stick to the skin, it is the go-to choice for pool officials, swimming teachers, and coaches who need reliable performance session after session. Plastic construction keeps it lightweight and comfortable to wear around the neck for the full duration of a training session or gala. The poolside whistle professionals trust. High pitch 117 dba easy to blow plastic body pea whistle poolside essential lightweight 3 key features ear-splitting pitch at 117 dba, the thunderer 660 produces a sharp, penetrating tone that carries clearly across a busy pool hall. The pea mechanism creates that distinctive trilling sound that swimmers instantly recognise as a command. Whether you are stopping a lane session or starting a race, the signal is unmistakable. Easy to blow designed to respond with minimal breath pressure, the 660 is ideal for coaches and teachers who need to blow the whistle repeatedly throughout a long session. You will not be left red-faced or breathless trying to produce a sound. Consistent response means consistent communication on the poolside. Plastic body for cold environments the plastic construction makes the thunderer 660 particularly well s...