Analog Speed Sensor You want to use the macro on a second bike? No problem,after all, the Macro series is designed to read the data from two different bicycles. So you do not need a second bike computer but only the Macro 2S free speed sensor and a second holder plate which is also available in the shop In addition to the sensor, the scope of delivery also includes mounting material, a spoke magnet, the required battery and the mandatory operating instructions. The Macro 2S free is exclusively designed for the analogue-sparking macro models Macro free and Macro high free as well as the cordless variants of the "mini"-series .