Leading manufacturer of intelligent LCD/LED displays and control systems for electric bicycles and e-scooters.
KING-METER (Tianjin King-Meter Technology Co., Ltd.) is a high-tech enterprise specializing in the research, development, and manufacturing of control systems for light electric vehicles. Known primarily for their electric bike displays, KING-METER provides critical dashboard interfaces that monitor speed, battery life, and pedestrian assist modes.
Their product range includes LED, LCD, and TFT color displays, often integrated with Bluetooth and navigation capabilities. As a major OEM supplier, KING-METER components are found on numerous e-bike brands worldwide, offering durable, water-resistant, and user-friendly solutions for riders.
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On most models like the KM529, press and hold the UP and DOWN buttons simultaneously for 2 seconds while the display is powered on to enter the general settings menu.
Error Code 21 usually indicates a current abnormality. This often suggests a short circuit in the motor phases or a controller issue that needs inspection.
Navigate to the trip distance interface and long-press the combination of buttons specified for your model (commonly UP and DOWN together) to reset the counter.
Press and hold the UP button (or the dedicated light button) for about 2 seconds. This will usually turn on both the screen backlight and the e-bike headlight.
Error Code 30 typically signifies a communication abnormality. Check the connections between the display and the controller to ensure cables are securely plugged in and undamaged.