This card uses optical excitation power mode, active window, please use the direction towards the card device; use if the card is not smooth, check to see if the battery is less than or proper installation methods, power is low, please also replace the two 2032 button battery.

The long-range cards with a special deck, install as close as possible before the mirror in order to not affect the drivers line of sight behind the office is appropriate, the deck to the rear-view mirror with a double-sided adhesive paste the appropriate position, then adjust the vehicle chassis vertical deck the best location, plug into the deck card after a solid paste inside.