With a loud whistle on one end and a floating compass on the other end, the Black 5-In-1 Survival Whistle makes the perfect emergency tool to have with you. It is a tough and durable black TPU construction with a grippy, ridged texture. Twist off the O-ring sealed cap to reveal the spacious, waterproof compartment. Set into the top of the twist off cap is a liquid filled compass and a signal mirror is housed on the inside of the cap. The 5-in-1 survival whistle is 4 3/4” in overall length and it features a necklace length, lanyard cord for ease of carry or attachment. Get one for your hiking and camping gear, your vehicle and your bugout bag.