CYCPLUS Speed and Cadence Sensor-C3 X 2 C3 X2 Color:C3 X2 twist until the unit is

twist until the unit is in line with main

3(W) inches

Also can be used separately as daily household repair tool

the yellow one is for night

CYCPLUS Speed and Cadence Sensor-C3 X 2 C3 X2 Color:C3 X2 twist until the unit isCYCPLUS Speed and Cadence Sensor C3 X 2 Product Features SPEED SENSOR & CADENCE SENSOR Package include: 2 pcs speed &cadence, you can use the speed and cadence sensor at the same time. BLUETOOTH & ANT+ MULTI PROTOCOL: Supports all kinds of equipments and applications which collect speed or cadence data via Bluetooth or ANT+ ULTRA SMALL DESIGN & LONG ENDURANCE: SIZE only 38mm29. 5mm9. 5mm & WEIGHT only 9. 2g. Not affect bike appearance and increase