Beware of the polarities when replace the LITHIUM BATTERY. The real value of the rpm is equal to what the number shown on the screen multiplies 10. The error of the value is about + - rpm.
ELECTRIC FUEL PUMP 6-12V NO.1660 PROLUX Prolux
SKYRC GNSS Performance Analyzer RC GPS+GLONASS Speedometer, Bluetooth Enabled Race Data Logger and Speed Tracker for RC Cars and Planes. GSM020 SK-500023
For Benelli Leoncino 250 Meter Speedometer Kilometer Table Count Table Odometer
Prolux Heat Sealing Covering Iron with Sock and Stand (1361AGB)
Prolux 2114F(Futaba) 230V Ni-Cd/Ni-MH Ni-MH Adapter