The special feature of the HR (High Efficiency = High Performance) is its excellent performance in the low speed range of 5 to 10 km/h. Due to the large friction wheel and the correspondingly low rotational speed, the magnetic field and winding count are better designed. The coil is anchored to the bottom of the housing. Above it, the eight-pole permanent magnet rotates. The axle rotates in two sintered bearings. A Zener diode ensures voltage limitation. There are separate cable connections with ground for the headlight and the taillight.