Product testers LOVED Sea-Scope™ - it opened up wonderful new worlds for them to explore. Not only could they solve the big mystery of what lies beneath the surface of the water, they could magnify spiders from a safe distance of 4-5 feet and faraway objects like birds with equal clarity. And that's not all—a temperature strip and ruler helped document discoveries made by scientific observation, and the attachable underwater Aqua Light flashlight improved visibility when the water was murky. Sea-Scope is approx. 14"L; extends to 21"L. Aqua Light takes three AAA batteries (not included).