1. Introduction
The PRUNUS XH-BC18-L Wireless Bike Speedometer and Odometer is designed to provide cyclists with essential riding data. This device features a large digital LCD screen for clear readability and a distinctive touch sensor for backlight activation, making it suitable for both day and night use. Its IP66 dustproof and waterproof rating ensures durability in various weather conditions. The speedometer offers a long wireless induction distance, allowing flexible mounting options, and boasts a long-lasting battery life of at least 8 months.
Key functions include real-time, average, and maximum speed tracking, odometer, trip distance, temperature, trip time, timer, calories burned, fat burned, and unit conversion between kilometers and miles. Six different interfaces can be switched to display your current riding status instantly.
2. What's in the Box
Please ensure all components are present before proceeding with installation:
- 1 x Cycling Computer
- 1 x Wireless Sensor
- 1 x Handlebar Mount
- 1 x Magnet
- 7 x Plastic Tie-wraps
- 3 x CR2032 Batteries
- 2 x Stickers (for mounting)
Image: All components included in the PRUNUS Bike Speedometer package.
3. Setup and Installation
Follow these steps to correctly set up your bike computer:
3.1. Battery Installation
Install the CR2032 batteries into both the cycling computer and the wireless sensor. Ensure the positive (+) pole of the battery faces upwards when inserting.
Video: Demonstrates the battery installation process for the PRUNUS Bike Computer and sensor.
3.2. Wheel Circumference Setting
Accurate wheel circumference is crucial for precise speed and distance readings. After battery installation, the screen will display a default circumference (e.g., 2060). To change this, press and hold both buttons simultaneously for 3 seconds. Use the right button to adjust the number and the left button to confirm. Refer to the table below or measure your wheel's circumference manually.
Image: Visual guide for manually measuring your bicycle's wheel circumference.
| Tire Size | Circumference (mm) | Tire Size | Circumference (mm) |
|---|---|---|---|
| 29" x 2.3" | 2326 | 27" x 1-1/4" | 2161 |
| 29" x 2.2" | 2305 | 27" x 1-1/8" | 2155 |
| 29" x 2.1" | 2288 | 26" x 2.3" | 2135 |
| 28" x 1-5/8" x 1-3/8" | 2205 | 26" x 2.25" | 2115 |
| 28" x 1.6" | 2224 | 26" x 2.1" | 2095 |
| 28" x 1.75" | 2268 | 26" x 2.0" | 2074 |
| 700c x 38mm | 2180 | 26" x 1.9"/1.95" | 2055 |
| 700c x 35mm | 2168 | 26" x 1.75" | 2035 |
| 700c x 32mm | 2155 | 26" x 1.5" | 1985 |
| 700c x 30mm | 2145 | 26" x 1.25" | 1953 |
| 700c x 28mm | 2136 | 26" x 1.0" | 1913 |
| 700c x 25mm | 2124 | 24" x 1.9"/1.95" | 1916 |
| 700c x 23mm | 2105 | 20" x 1-1/4" | 1618 |
| 700c x 20mm | 2074 | 16" x 2.0" | 1253 |
| 700c Tubulars | 2130 | 16" x 1.5" | 1206 |
| 650c x 23mm | 1990 | ||
| 650c x 20mm | 1945 |
3.3. Mounting the Computer
Attach the handlebar mount to your bicycle using the provided zip ties. Ensure it is securely fastened and positioned for optimal viewing during your ride. The computer slides into the mount until it clicks into place.
3.4. Installing the Wireless Sensor and Magnet
Install the wireless sensor on the front fork of your bicycle using the provided zip ties. The magnet should be attached to a spoke on the wheel. Ensure the distance between the sensor and the magnet is no more than 3mm (0.1 inch) for accurate readings. The sensor should be positioned on the left side of the bicycle.
Video: Detailed installation guide for the PRUNUS Bike Computer, including sensor and magnet placement.
4. Operating Instructions
The PRUNUS XH-BC18-L offers a variety of functions to enhance your cycling experience. Use the left and right buttons on the device to navigate through modes and settings.
4.1. Basic Functions
- SPD (Speedometer): Displays current speed.
- ODO (Odometer): Tracks total distance traveled (0.001-99999km/m).
- DST (Trip Distance): Records distance for the current trip.
- MXS (Maximum Speed): Shows the highest speed achieved during the current trip.
- AVS (Average Speed): Calculates the average speed for the current trip.
- TM (Elapsed Time): Displays the duration of the current trip.
- CLK (Clock): Shows time in 12H or 24H format.
- Temperature: Displays current ambient temperature.
- Calories: Estimates calories burned during the trip.
- Fat Burned: Estimates fat burned during the trip.
Image: The PRUNUS Bike Speedometer displaying its wide range of functions.
4.2. Mode Switching and Data Reset
- Press the RIGHT button to cycle through different display modes (e.g., ODO, DST, MXS, AVS, TM).
- To reset trip data (DST, MXS, AVS, TM), hold the LEFT button for 3 seconds while in the desired trip mode.
- The device features an automatic wake-up function. It will enter standby mode after a period of inactivity and automatically activate when motion is detected.
- The backlight can be activated or deactivated with a slight touch on the designated sensor area.
Image: The touch sensor for activating the backlight on the PRUNUS Bike Speedometer.
5. Maintenance
The PRUNUS XH-BC18-L is designed for durability and low maintenance:
- Waterproof Rating: With an IP66 rating, the device is dustproof and resistant to water splashes. Avoid prolonged submersion and dry it promptly after exposure to rain.
- Battery Life: The low-power consumption design ensures a battery life of at least 8 months. A low battery reminder will appear on the screen. Note that replacing the battery will clear previously stored data, but shutting down the device will not affect data storage.
- Regularly check the sensor and magnet for secure attachment and proper alignment (within 3mm distance) to ensure consistent performance.
Image: The IP66 dustproof and waterproof design of the PRUNUS Bike Speedometer.
6. Specifications
- Brand: PRUNUS
- Model Number: XH-BC18-L
- Color: Black
- Product Dimensions: 5.7"L x 2.8"W x 2.2"H
- Item Weight: 2.8 Ounces
- Screen Size: 2.5 Inches
- Display Type: LCD
- Battery Life: 240 Hours (approx. 8 months)
- Sensor Type: Speed Sensor
- Battery Cell Composition: Lithium Polymer (CR2032)
- Connectivity Technology: Bluetooth
- International Protection Rating: IP66
- Mounting Type: Handlebar Mount
- Human Interface Input: Touchscreen
7. Troubleshooting
If you encounter issues with your PRUNUS Bike Speedometer, consider the following:
- No Display/Power: Check if the CR2032 battery is correctly installed and has sufficient charge. Replace if necessary.
- Inaccurate Readings/No Signal: Ensure the wireless sensor and magnet are correctly aligned and the distance between them is no more than 3mm (0.1 inch). Verify the sensor is securely attached to the fork and the magnet to a spoke.
- Inconsistent Data: Re-check your wheel circumference setting for accuracy. Ensure there are no strong electromagnetic interferences nearby.
- Display Not Responding: Try removing and reinserting the battery to perform a soft reset.
8. Warranty and Support
For warranty information or technical support, please refer to the product packaging or contact PRUNUS customer service directly. Keep your purchase receipt for any warranty claims.