What are the inside dimensions?

I would say useable inside space is 6" X 3" X 1" - especially if you intend to use it for a larger cell phone. The top of the storage area is larger than the bottom, hence the other dimensions in the other answers. I like my cell phone to sit flat on the bottom and not at an angle.

If this fell in the water with about a pound of weight in it would it float

I just tested it for You. I put at least a pound worth of stuff in it , which filled it almost completely. About 1/4 of the box remained above water. I hope this helps You.

Is it fully submergible?

Someone gave me a used one with the clamp missing off the long side of the box. I put a piece of toilet paper inside and then submerged the box in a bucket of water. Figured i better check it out before trusting it to protect my phone on the river. Checking every 15 - 20 minutes, I noticed no water inside till around the hour and fifteen minute mark. Even then, it was just a little.

Has anyone tested its durability? Such as dropping it from an extreme height?

I bought about 15 for my white water rafting guides to use in their trips to carry their phones. So far so good. The case has stood up to lots of abuse. As for dropping from height I wouldn't worry about the case but would be worried about any fragile things inside the case as it is not padded on the inside. Hope this answers your question

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💼 Stay dry, stay secure, stay ahead with Plano’s Waterproof Stowaway!

LOCKABLE SECURITY - Three tight cam-action latches ensure your gear stays safe and sound.
COMPACT YET SPACIOUS - Perfectly sized to stash phones and small valuables without bulk.
DURABLE LIGHTWEIGHT - Robust plastic build at just 0.28g for effortless portability.
VERSATILE STORAGE SOLUTION - Ideal for fishing tackle or everyday essentials—stay organized on the go.
ULTIMATE WATERPROOF PROTECTION - Dri Loc O-ring seal keeps valuables bone dry, no matter the adventure.

The Plano 3440-10 Waterproof Stowaway is a compact, lockable dry box featuring a Dri Loc O-ring seal and three cam-action latches to provide superior waterproof protection. Designed for secure storage of phones and small valuables, it combines durability with lightweight portability, making it an essential accessory for fishing enthusiasts and professionals alike.

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€ 42.70

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Manufacturer	PLANO
Part number	344010
Item Weight	0.28 g
Product Dimensions	18.73 x 11.43 x 4.45 cm; 0.28 g
Item model number	344010
Size	3400
Color	Multi
Style	3400
Material	Plastic
Pattern	Solid
Shape	Rectangular
Item Package Quantity	1
Number Of Pieces	1
Special Features	Lockable
Included components	Tackle storage
Batteries Included?	No
Batteries Required?	No

Plano 3440-10 Waterproof Stowaway (3400 Series)

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