Review on 🚗 ELING Universal Digital GPS Speedometer: Accurate Speedo Gauge for Car, Motorcycle, Truck, Yacht, Vessel - 3-3/8'' (85mm) 9-32V by Josh Culotta

I installed this on my 1999 Moomba Mobius direct drive boat. We love skiing, wakeboarding and surfing. This replaced the old sensor with Pitot tubes. It was easy to install. All you need is +12 volts from ignition and ground. I bought and used an auxiliary power fuse box. Turn the key and it turns on. Seems accurate. Double checked with my phone on the river. I will be ordering another one for my tracked robot project.