ROCKBROS C3 Speed Cadence Sensor

Quick Start

1. Push the battery cover’s protrusion to the center position and then open the battery cover.
2. Remove the battery isolation sheet and then reinstall the battery cover.
   
3. Install the battery cover onto the body. When installing the battery cover, make sure to align the protrusion to the center position.
   
4. Press the battery cover tightly, and then push the battery cover’s protrusion to the left or right to set the sensor to speed or cadence mode.
   
5. After installation, the indictor light will flashes for 10 seconds.
   
   
   Blue: Speed
   Green: Cadence
   Red: Low battery

Fix To Bicycle

Fix the cued rubber pad on to the bottom of the sencor.

Fix the at rubber pad on to the bottom of the sencor.

Fix the sensor onto the hub using a rubber band.
Turn the wheel to activate the sensor and establish a connection with your device or app.

Fix the sensor onto the crank using a rubber band.
Turn the crank to activate the sensor and establish a connection with your device or app.

Instructions for Use

1. Before using, please open the battery cover, and remove the transparent insulation spacer.
2. One sensor cannot measure both speed and cadence simultaneously.
   If you need to measure both, please purchase two sensors.
3. For speed measurement, the hub width must be more than 38mm.
4. The product is used for cadence measurement by default. Bluetooth name is ROCKBROS C when used for cadence measurement.
   Bluetooth name is ROCKBROS S when used for speed measurement.
5. When using Bluetooth protocol, it can only be connected to one device or app at a time.
   To change the device or app, please disconnect the previous one first.
6. When using the ANT+ protocol, it can be connected to multiple devices simultaneously.
7. When using a smatphone app, search for the sensor in the app.
   Searching via phone Bluetooth is invalid.

Specifications

• Dimension: 9.5mm×29.5mm×38.0mm
• Weight: 9.2g
  Battery: 220mAh CR2032
• Usage time: 600 hours (Cadence) / 400 hours (Speed)
• Standby time: 300 days
• Protection rating: IP67
• Compatible with: Garmin,Wahoo, Zwift, Tacx, BLjton, XOSS, Blackbird, etc.
• Protocol standards: The sensor can connect to any APPs or devices that suppo Bluetooth or Ant+.

Summary

Switch the work modes

• Speed mode
  
• Open the battery cover
  
• Cadence mode
  

When switching modes by turning the battery cover, please hold the cover with your hand to prevent it from popping up when passing through the gap in the middle.

Indicator Light

Blue light flash
Speed measurement

Green light flash
Cadence measurement

Red light flash
Battery power is less than 20%

Customer Support

Factory Info

Company: Yiwu Rock Spoing Goods Co.,Ltd
Address: Building 1 No. 618, Danxi Noh Road, Beiyuan Sub-district, Yiwu City, Zhejiang Province
Tel: 86-0579-85263215
Fax: 86-0579-85262663
Website: WWW.ROCKBROSBIKE.COM

MADE IN CHINA

Documents / Resources

ROCKBROS C3 Speed Cadence Sensor [pdf] User Guide C3, C3 Speed Cadence Sensor, C3, Speed Cadence Sensor, Cadence Sensor, Sensor

References

• User Manual