I have a Lowrance Portable Fish Lo-K-Tor, aka "The Green Box". It's a flasher unit powered by 2 lantern batteries. I have two new batteries in it so you can see that the unit works.

　　The unit comes with batteries, transducer and transducer bracket that secures to the transom. Once the bracket is in place, you just snap the transducer in. Unit can be used while ice fishing also.

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　　Location: Belvidere