The Netset Pro44 is a 50-channel, handheld VHF/UHF programmable scanner. It was produced for both the North American and European markets, leading to its different brand identities:

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Or, scan the QR code often found on the back of older Byte Brothers packaging (if you still have the box).

manual, which is the identical hardware twin of the Netset model. Direct Manual Link

You can find digital copies of the owner's manual on specialized scanner hobbyist websites. A reliable source for viewing similar models is Discriminator.nl