This speed controller is a performance upgrade accessory designed for Xiaomi M365 Pro, Pro 2, and 1S Essential models (note: installation on the 1S Essential requires a 350W motor replacement). It features dual speed states: a default low-speed mode capped at 20 km/h and a high-speed mode enabling speeds up to 38 km/h. **Key Features & Functionality:** * **Dual Speed Modes:** Easily switch between a restricted 20 km/h mode and an unlocked 38 km/h mode. * **Flexible Switching Methods:** Change speed states via a customizable pedal sequence (brake then accelerator, 3-15 times) or directly through a dedicated Wi-Fi web interface. * **Persistent Settings:** Your selected speed mode is saved permanently, even after restarting the scooter. * **Wi-Fi Configuration:** Connect to the controller's unique Wi-Fi network (SpeedRe+serial digits) with the default password '99999999' to access settings. The password resets to default if the main controller is changed. * **Full Compatibility:** Maintains full functionality with official apps for viewing scooter data (speed, battery, serial number), configuring parameters (lock/unlock, energy recovery, lights), and displaying fault codes. * **Firmware Note:** Do not attempt to update or flash the controller firmware via official apps, as this will fail. Use only for data display and parameter configuration. * **Seamless Integration:** The scooter's dashboard correctly displays speed, gear, battery level, and unit settings (metric/imperial) after installation. All normal operations like power, lights, and gear indicators work perfectly. **Package Includes:** * 1 x Electric Scooter Speed Controller (Black, Plastic) **Please Note:** Slight color variations may occur due to photography and monitor settings. Product dimensions have a tolerance of +/- 1-3 cm.