The most advanced combination of the front and rear bicycle lights features wireless Smart Connect technology. This pair can be quickly programmed and adjusted through the accompanying smartphone LED Ally application. After programming and pairing, you can control the front and rear light through wireless connection. You can set up only those modes that you will need , and up to 4 sets of modes for any type ride you are planning no matter if it is during the day or night. That is the Lezyne CONNECT SMART 1000XL / KTV SMART PAIR.