OSRAM LEDriving Smart Canbus: fits 12V H4 LED & H19 LED bulbs. Areas of application: high beam, low beam, on-road and off-road Error message free: bypasses vehicle fault detection Robust and durable: high-quality aluminium housing. Tested and validated with IP protection class IP54. Twin pack: Two Canbus in one box Only the combination of Osram LED lamps in conjunction with the official Osram accessories - LEDriving ADAPTER, LEDriving Smart CANBUS, LEDriving CAPs and LEDriving ERROR CANCELER is approved for the operation of our LED lamps.