U2U Jewelry Classic High Polished Stainless Steel Whistle Pendant Necklace(sound It on Earthquake or the Extra-terrestrial Comes for Help) U2U WHISTLE PENDANT MATERIAL AND DIMENSION.It is made of sugical steel.Dimension:L1.65 * W0.39 * 0.39(inch).We polished the whistling surface, which made it look very bright.And you could find "U2U" LOGO behind the pendant body. U2U WHISTLE PENDANT COULD BE USED FOR PETS TRAINING.You could use it for dogs training,cat training and other little pets. U2U WHISTLE PENDANT COULD BE USED FOR EMERGENCY AND SURVIVAL.If someone is in a critical situation, but must allow the rescue team to know the location of the trapped person, please use it; If someone is in a critical moment, he must draw nearer the attention of other walkers or neighbours,please use it;When someone can not pronounce or move the body, and no any help button is close to you,you can use the whistle. U2U WHISTLE PENDANT COULD BE USED FOR CAMPING AND HIKING.when the travelers do not have access to 4G or WIFI signal coverage area, using whistles can keep each other communication and relatively safe distance U2U WHISTLE PENDANT PACKAGE COMMENT.Whistle,2 metal chains,and nice quality wrap box.If you have anything that we can do for you,please contact us when you get the parcel.We will process your case within a short time.