The Safety Signaling Mirror with Lanyard is designed with sighting the target using the viewfinder hole in the center of the device.

A diver separated from the dive boat or actually lost at sea can use the sun's light to reflect an intense beam that can be seen from over a mile away in good conditions. The US Air Force survival handbook says the signal mirror is "the most underrated signaling device found in the survival kit." The single-side Safety Signaling Mirror is made from high quality, durable material that will not corrode due to the effects of salt water. The diver uses the viewfinder hole in the middle of the device to aim the signal as required. There is an easy-to-understand diagram on the back side of the mirror with instructions for use. Hopefully you will never need to use this but it is an excellent safety device especially for open water divers that are not in close proximity to a shoreline.

A lanyard is Included. Overall size is { 3.0 x 2.0 x 0.15 in | 7.6 x 5.1 x 0.38 cm }