Up for sale are 2 pieces of Outdoor Survival Whistle SOS Signal Whistle for camping, hiking, team work, or emergency Use. [Details about this item] With 3 different frequency voices. Lightweight and easy to carry with a keychain. Simple to use with a long life span. Suitable for outdoor activities like camping, hiking, hunting, adventures, etc. A necessary equipment for outside help. Material: Plastic Size: 7 * 2.8 * 0.7cm / 2.8 * 1.1 * 0.3in Weight: 9g / 0.3oz Package : 2 Survival Whistle [Shipping] The items will be shipped USPS First Class Mail but with NO tracking. They will arrive in a large yellow envelop as shown in the picture.  Please keep an eye on your mailbox.  Thank you!