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Sensor Activation:

 

 Verify proper magnet install and spin wheel or turn crank more than 

two revolutions. Initial sensor activation and magnet alignment will be indicated by the 

LEDs flashing up to 10x.  

Please Note:

 The sensor will stay active for at least 2 minutes although the LEDs no 

longer flash.

Bluetooth Smart Connection:

  Install and activate sensor. Turn on your phone’s (or other 

compatible device) Bluetooth capability. Please note, Bluetooth Smart devices do not 

always appear in your phone’s listing even when connected. Open the desired cycling app 

and follow instruction for Bluetooth Smart sensor connection. All apps collect, share, and 

display speed and cadence information differently.

FR

—La diode Rouge clignotera lorsque l’aimant vitesse est en cours d’appairage. La 

diode Verte clignotera lorsque l’aimant cadence est correctement appairé. Ces lumières 

clignoteront seulement durant les 10ers tours de roue.

DE

—Die rote LED blinkt, wenn der Tacho-Magnet korrekt ausgerichtet ist. Die grüne LED 

blinkt, wenn der Trittfrequenz-Magnet korrekt ausgerichtet ist. Beides erfolgt nur während 

der ersten 10 Umdrehungen von Kurbel bzw. Laufrad.

ES

—El LED rojo emitirá destellos cuando el imán de la velocidad esté correctamente 

alineado. El LED verde emitirá destellos cuando el imán de la cadencia esté correctamente 

alineado. Los LEDs emitirán destellos sólo durante las diez primeras revoluciones.

3-5mm

Interchange Combo Sensor

sensor

mounting strap

Speed Magnet  

(wheel)

cadence magnet  

(crank) 

Place sensor on non-drive side 
chainstay with logo facing out.

Pull mounting strap over hook, 
or use zip ties if necessary. Note: 
remove wheel to ease installation. 

Align cadence band with  
marking on sensor.

Adjust sensor speed arm within 3-5mm of sensor and tighten with a 
2mm hex.

LED indicators will flash upon 
activation by two complete pedal 
strokes.

Adjust sensor so distance is 
3-5mm from cadence band.

Speed magnet. 

Align speed magnet with marking 
on sensor and tighten on spoke.

Replacement battery CR2032.

Attach mounting strap or zip ties.

Install cadence magnet on  
non-drive side crank arm with  
logo facing out. Pedal will need  
to be removed for this step.

BATTERY REPLACEMENT

2Nm

2mm

3-5mm

Statements of Regulatory  

Compliance 

FCC Compliance 

Interchange Digital Combo Sensor

 FCC ID: 04GTKCOMBO

This device complies with part 15 of the FCC Rules. Operation is subject 
to the following conditions: (1) this device may not cause harmful 
interference, and (2) this device must accept any interference received, 
including interference that may cause undesired operation. 

NOTE:

 This equipment has been tested and found to comply with the 

limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. 
These limits are designed to provide reasonable protection against harmful 
interference in a residential installation. This equipment generates uses 
and can radiate radio frequency energy and, if not installed and used in 
accordance with the instructions, may cause harmful interference to radio 
communications. However, there is no guarantee that interference will not 
occur in a particular installation. 
This product may cause interference to radio equipment and should not be 
installed near maritime safety communications equipment or other critical 
navigation or communication equipment operating between 0.45-30 MHz.
If this equipment does cause harmful interference to radio or television 
reception, which can be determined by turning the equipment off and on, 
the user is encouraged to try to correct the interference by one or more of 
the following measures: 
—   Reorient or relocate the receiving antenna. 
—   Increase the separation between the equipment and receiver. 
—   Connect the equipment into an outlet on a circuit different from that to 

which the receiver is connected. 

—   Consult the dealer or experienced radio / TV technician for help. 

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