The SE 7-IN-1 Green Survival Whistle - CCH7-1G can easily fit into your pocket, backpack, survival pack, and purse. For easy storage and transportation, and can hang onto your neck, wrist, and gear with the lanyard. * Features of our 7-IN-1 Green Survival Whistle include: (1) Safety whistle (2) 5x magnifier (3) Bright white LED flashlight (4) Storage container (5) Compass (6) Thermometer in Fahrenheit and Celsius (7) Mirror for signaling (8) Large button cell CR1220 batteries for longer life (9) Lanyard SE Intellectual Property Rights Notice: Important: Avoid getting counterfeit items. Genuine SE products come with the SE logo on the packaging. SE is a registered trademark protected by US Trademark Law.