ITEM NAME:Underwater Strobe Signal Light Scuba Night Dive Marker LED Yellow Flashy Sa M4T3 Underwater Strobe Signal Light Scuba Night Dive Marker LED Yellow Flashy Sa M4T3 Signal Light for Location - It is Perfect for keeping tabs on the location of your partners during a night dive, or when exploring dark areas of the underwater world during daytime. Great for hanging on diving tanks or BCD for easy and clear location and identification during dives. Rotary Switch & Multi-purpose - Featuring a twist on/off switch at head, very easy to operate. Tighten the head to turn on the light, unscrew the head to turn off. This lighting device is a firefly beacon led signal light for safe diving. Can also be used for jogging, camping, fishing, kayaking, raving, group outing at night, team tag, walking with family. Compact Design & Great Waterproof Performance - The signal light's appearance is inspired by torpedo, it's a cute dive signal light. With quality waterproof O-ring, can be used underwater 200m. Include a string for easy attach to dive equipment Long Runtime & Battery Included -