ScubaPro Signal Whistle ScubaPro Sale! from £7.00 GBP /per Produc variants Default Title - Sold Out Qty. Sold Out This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. Couldn't load pickup availability Refresh OVERVIEW Whistle for surface signaling. Clip it to your BCD so it's always within easy reach. A simple and reliable way to get attention when floating on the surface.