TOtrait свисток для выживания аптечка аварийный сигнал кемпинга пешего туризма

Характеристики

[item details] Product Name: multi audio survival whistle With a chain, there are three holes, each hole has a different sound, sound and color are good, and the harmony is pleasant. Size: 7.0 * 2.7 * 0.7m Net weight: 12g Color:green Package include:1*whistle Package weight:about 0.1kg [product characteristics] Material: high quality plastic; Whistling sound is clear and loud, transmission distance is far used for calling for help, gathering companions, field survival, etc; Quick hanging can be hung on tent, equipment, kettle, backpack, key ring and other accessories; Strong active, wear-resistant, practical and convenient. [signal rules] ● short tone (one second); ■ long tone (more than 3 seconds); The interval between whistles in the instruction is 2-3 seconds, and the interval between instructions is more than 30 seconds (for example, the interval between repeated instructions is more than 30 seconds) ●●■ (two short and one long) converges towards the direction of whistle; ●■ (one short and one long) start and accelerate; ●■■ (one short and two long) someone left behind, the front team waiting for the back team; ●● (three short-term) ask for help in case of difficulties; ●●■■●● (three short, three long and three short) this is the international general SOS code. Warm prompt: The size of the manual measurement, due to different measurement way there may be a 1-2 cm error is normal range