548B is divided into Chinese display and Chinese display. Chinese display is more suitable for domestic customers'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' sales and English display is suitable for foreign customers'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' sales.![](https://img.alicdn.com/imgextra/i3/678836360/T2JJR2XeBeXXXXXXXX_!!678836360.jpg)
![](https://img.alicdn.com/imgextra/i3/678836360/T2OwD_XXhXXXXXXXXX_!!678836360.jpg)
![](https://img.alicdn.com/imgextra/i3/678836360/T2kbrtXgdbXXXXXXXX_!!678836360.jpg)
![](https://img.alicdn.com/imgextra/i2/678836360/T2jPj9XodXXXXXXXXX_!!678836360.jpg)
Easy to install
Suitable for bicycles and electric bicycles with steel wheels
The meter head is plug-in type (unplug at any time to prevent theft)
【Product name】 Waterproof bicycle computer model SD-548
【Brand】 Shundong/SUNDING
【Material】 Engineering plastics electronic components
【display】 LCD display
【size】 46mm*45mm*19mm
【weight】 About 100G
【Configuration】 Watch body, watch holder (wired with induction probe), induction magnet, cable tie, Chinese manual
Note: Keep a sensing distance of 3~5mm between the probe and the magnet. Otherwise, the speed value cannot be sensed!
installation tips:
1. Install the meter head base on the handlebar;
2. Insert the AG13 button battery into the battery slot on the back of the meter
3. Initialize the code table data, generally only need to set the tire circumference as a parameter, then it can be used normally;
3. Insert the meter head into the slide groove of the meter head seat;
4.Install the sensor on the front fork, with the sensor head facing the spokes;
5. The induction magnet is installed on the spokes, aligned with the induction head and spaced apart3-5mmabout;
6. Fix the cables with nylon cable ties;
7. Check whether the above meter head base, sensor and induction magnet are installed firmly. This package comes with necessary rubber gaskets and detailed instructions in Chinese and English to ensure your installation is successful.
8. For more functions, please refer to the manual settings
Setting function
1. Install the battery into the battery slot on the back of the meter;
2. Press the right button within 15 seconds to enter the tire circumference setting;
3. Refer to the wheel diameter and circumference comparison table. For example, the wheel circumference of the 28 model is 224cm, press the left button to set the three-digit value to 224(The machine defaults to 208cm)
4. Right click to confirm;
5. For more functions, please refer to the manual settings.
![](https://img.alicdn.com/imgextra/i4/678836360/T2DLaNXmFaXXXXXXXX_!!678836360.jpg)