Review on Lucky Portable Sonar Fish Finder: Waterproof Handheld Wireless Fishing Finder for Boats, Kayaks, Ice Fishing, and Sea Depths by Ricky Pee

I've had one for about 9 months, used it 7-8 times. Good for depth reading, but otherwise only good as any grass, seaweed or seaweed (or anything else in the water) floating around will register as a fish. But for the money it's ok. But only if it really works! Now I charge it fully, turn it on, it connects to the base unit (which shows 5 bars, temperature and full battery for the sphere unit), the blue light flashes 5 times within 5 seconds, then turns off and loses the Connection. does it again and again I can't continue, I can't keep in touch for more than 4-5 seconds. I don't know why he's doing this, but now it's pointless. I wouldn't waste your money.