PZRacing BW400 B-Tronic Plug & Play GPS Lap Timer for BMW S1000RR HP4 Turn yourBMW's factory dashboard into a GPS lap timer! No splicing or wiring work is needed. Very simple installation; Plug the unit into the special input of your motorcycle, then place the button, receiver modules and you are on your way! The state of the art 50Hz GPS receiver used in this unit ensures extremely accurate lap times! Lap times will be stored and displayed on your factory instrument cluster! No more wondering about your lap times, placing beacons on the side of the track hoping that the unit will pick up! Unlike other GPSLap timers on the market this unit enables you to view your lap times directly on your factory LCDDisplay!