It is auto focusing, auto exposing and auto advancing. It takes 4 1.5v AAA batteries. In a really clean condition and its fully functional (fitted and tried it out with batteries this morning. There is no corrosion in the battery housing, no perishing to the rubber seals, though l advise caution if using this underwater after all these years, but of course that decision is up to you. ).
eBay
Seafrogs SF-01 325ft Underwater Strobe Waterproof Camera Flash Light for Sony Canon Fujifilm Nikon Underwater Camera Housings
Aliexpress UK
Overall looks clean showing a few minor surface marks to the base plate, viewfinder is clean, all shutter speeds operate correctly. The lens optics are clean, with No fungus, marks, or scratches, all seals are in perfect condition.
eBay
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Aliexpress UK
Been used couple of times but most of the it’s been on drawer. Excellent condition
eBay
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Aliexpress UK
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Rugged, durable, shock-proof rubber shell.
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Aliexpress UK
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Ultra HD 4K Action Camera 720P/30FPS WiFi Underwater Cameras Waterproof Helmet Bicycle Video Recording Cameras Outdoor Sport Cam
Aliexpress UK
Underwater 35mm Camera, Focus Free 28mm Lens, 2 View Finders One for Above Surface And One For Below, Still Packaged, Never Used
eBay
2.0" Action Camera 4K Ultra HD 30FPS WiFi Underwater Cameras Waterproof Helmet Bicycle Video Recording Cameras Outdoor Sport Cam
Aliexpress UK