1.Power Assist System Compatibility: This PAS PCB board is designed for use with BBS01B, 02B HD drive motors, providing a reliable replacement for the Hall sensor component. Compatible with various power options from 250W to 1000W, it integrates seamlessly with your existing ebike system for continued performance. 2.Hall Sensor Technology: Featuring advanced Hall effect sensing technology, this replacement module detects magnetic field changes to precisely measure pedal rotation. The builtin filter helps eliminate signal interference, delivering smooth and consistent power assistance during your cycling adventures. 3.Easy Installation Design: Measuring just 9 x 1 x 1 cm and weighing only 10g, this compact PCB board fits into your motor housing without modification. 4. Quality Construction: Crafted from composite materials selected for their LONG LASTING properties and resistance to environmental factors. This robust construction helps insure reliable performance through various weather conditions and riding environments common in the UK.