Lifesystems Echo Whistle A loud safety whistle which is D of E approved. Ideal for anyone who enjoys the outdoors, a essential piece of your kit to ensure keeping you safe The Echo whistle is the lightest of Life systems safety whistles. The Whistle creates a high pitch single tone that can be heard over a long distance. The echo whistle has a keyring and a clip on attachment so it can be attached to a jacket. Plastic Body High pitch single tone Floats on water Key ring and attachment clip-on design 108dB loudness Element Proof Weight:12g Dimensions (packed):13 x 63 x 12mm This product is specifically recommended by the D of E charity as the best choice for those taking part in their bronze, silver, or gold awards SOS International Distress Signal - 6 blasts of a whistle followed by a pause of 1 minute and then a repetition of 6 blasts. If your signals are heard, there should be an answering whistle - 3 blasts followed by a pause of 1 minute, repeated several times. Continue to signal until you have been located. Unless you require assistance, do not do anything that could be mistaken for a distress signal.