Does anyone make a motorcycle GPS that does not require a phone to use? I use a flip phone, and intend to continue doing so. The old Garmin Nuvi I have in my car works just fine, but won't work on a bike because you can't hear it. All I need is a GPS with an earphone. It doesn't even have to be waterproof, but it does have to be mountable on a bike. I can always remove it or put a plastic bag over it if it rains.