Description: 7 in 1 multifunctional survival whistle. Seven functions in one: high decible whistle, compass, thermometer with range from -20 °C to 50 °C, magnifying glass, reflector mirror, led light and small sealed compartment. Compass for positioning abstract direction immediately. Thermometer for measuring the current temperature of your location, easy to read. Super durable construction ensures proper functioning when you need it most while boating or for any other purposes. Super loud whistle provides audible protection for mariners, sporting events and personal safety to ensure that you will be heard when you need assistance. Hidden magnifier with stretchable design, whistle can help you when you are in danger or in emergency. Specification: Material: Plastic Color: Black Size: 10.8x4.5cm/4.25x1.77 inch Package Includes: 1 Piece 7 in 1 Survival Whistle(6 Pack) Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-3mm differences due to manual measurement.