DUPLICATOR TRANSMITTER "SMART L11" 4 CHANNELS - SAFETY BUTTON "SWICTH OFF" - FREQUENCY 433MHZ - YELLOW LED - ONLY FOR AUTHORIZED RESELLERS - EXCELLENT QUALITY AND DOUBLE DURABILITY OF ALL THE CODES IN THE FIXED STORES, "SWICTH OFF" WE HAVE AN INNOVATIVE FUNCTION THAT ALLOWS US TO TURN IT ON OR OFF THROUGH SAVING THE BATTERY IN CASE OF PROLONGED DISABILITY. IN TERMS OF SAFETY WITH THIS FUNCTION WE ALSO AVOID UNFAIR DRIVES.