NEW IN STOCK Button activated rolloff film that covers the whole lens. Clear vision. To activate Speedview simply press the trigger (button) mounted onto the handlebar using your thumb. Once activated an encoded wireless signal is transmitted up to the goggle unit. Once a signal is received it is then decoded activating the motor. A perfectly clean strip of film then winds across clearing all mud/sand/water from the rider’s line of sight. Speedview’s advanced encoding and syncing technology allows only a pre-synced trigger and goggle unit to communicate with each other. So no matter how many riders are on the track Speedview systems will never cross-activate.