USER MANUAL

Standard Accessories

The following accessories are included with the main device:

• Main Device x 1 (CR2032 battery installed)
• Crank Magnet x 1
• Spoke Magnet x 1
• Rubber Band for Main Device x 1
• Rubber Pad for Main Device x 1
• Battery Cover Tool x 1
• Cable Ties x 6
• Screw Wrench x 1
• User Manual x 1

Accessories Installation Diagram

This section illustrates the installation of the sensors on a bicycle:

• Crank Magnet: Detects the cycling cadence.
• Spoke Magnet: Detects the cycling speed.
• Main Device: Detects both cycling cadence and speed. It transfers real-time data to a smartphone or sports watch via Bluetooth and ANT+.

Remove the Insulating Sheet

1. Rotate the battery cover to the OPEN position using the battery cover tool, then remove the battery cover.
2. Remove the battery insulating sheet. Reinstall the battery cover by placing it in the OPEN position and rotating it back to secure.

Diagram shows battery cover opening and removal of insulating sheet.

Testing Mode & LED Light

The BK805 features a testing mode to verify correct magnet and sensor installation. It is recommended to run this mode after each installation.

To enter testing mode, reinstall the battery (refer to Battery Replacement section). The testing mode will remain active for 15 minutes after battery installation.

• If the speed sensor (Spoke magnet) is installed correctly and the wheel rotates, the LED light will flash blue.
• If the cadence sensor (Crank magnet) is installed correctly and the crank is turned, the LED light will flash green.

Diagram shows the main device with LED light and indicates the sensing positions for the crank magnet (cadence sensor) and spoke magnet (speed sensor).

Accessories Installation

1. Install the crank magnet onto the crank arm and secure it with two cable ties. Do not fully tighten the ties until the correct position is determined; subsequent operations follow the same principle.
2. Install the rubber pad onto the main sensor.
3. Align the sensing position of the cadence sensor with the crank magnet and install it as shown in the diagram, securing it with cable ties.
4. Attach the spoke magnet to a bicycle spoke, aligning it with the sensing position of the speed sensor, and tighten it. This applies to both circular and flat spokes.
5. Verify that the crank magnet and spoke magnet are aligned with the sensor's sensing position. The distance between them should be less than 12mm. Secure the tail of the sensor using the screw wrench. Note: Do not force the rotation beyond the device's range to prevent damage.
6. Confirm successful installation by turning the crank and the bicycle's back wheel. The speed LED should show blue, and the cadence LED should show green. Once confirmed, tighten all cable ties, cut off excess parts, and secure all accessories with the rubber band.

Diagrams illustrate the installation steps, including magnet alignment and distance checks (a < 12 mm, b < 12 mm).

Battery Replacement

If the device is not detected, consider replacing the battery.

1. Rotate the battery cover to the OPEN direction to remove it.
2. Remove the old battery and dispose of it properly according to local regulations. ♻️
3. Install the new battery, paying attention to the positive (+) and negative (-) poles. Use the battery cover tool to rotate the battery cover in the opposite direction of OPEN to secure it.

⚠️ To avoid danger, batteries should be kept away from children.

Specifications

Applicable Smart Phones

• ? iOS 9.0 or above, iPhone 4s model or above
• ? Android 4.3 or above with Bluetooth 5.0

Compatible Apps

The sensor is compatible with various fitness applications, including:

• CoospoRide
• Wahoo Fitness
• Zwift
• Openrider
• Other Apps with speed and cadence display.

(Notice: Please refer to your latest test or app instructions for compatibility details.)

FAQ (Frequently Asked Questions)

• Q: Cadence or speed data is missing.A: Please check the position of the installed magnet and sensor. Adjust them until the data becomes normal.
• Q: Can the Bluetooth 5.0 and ANT+ protocols work simultaneously?A: Yes, the Bluetooth 5.0 and ANT+ protocol of the bicycle speed/cadence sensor can work at the same time. If you wish to connect to a smartphone and sports watch separately, ensure both devices support Bluetooth 5.0 and ANT+.
• Q: Compatibility with other apps.A: The device is compatible with a variety of popular fitness apps. For connection instructions, please refer to the specific app's documentation.

Disclaimer

The information contained in this manual is for reference purposes only. The product described may be subject to alteration due to the manufacturer's ongoing research and development plans, without prior announcement.

COOSPO shall not bear any legal responsibility for any direct or indirect, accidental, or special damages, losses, or expenses arising from or in connection with the use of this manual or the product described herein.

FCC Statement

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. If not installed and used in accordance with the instructions, it may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. 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 an experienced radio/TV technician for help.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two 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.

Product Care and Safety

♻️ Waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Contact your local government or a retailer for additional information.

• ⚠️ Do not open or modify the product.
• ⚠️ Do not disassemble or attempt to service this product.
• ? This product is safe under normal and reasonably foreseeable operating conditions.
• If the product is operating improperly, contact COOSPO support.
• The product must be returned to the manufacturer for any service or repair.