Features: Supports English voice commands only; other languages unsupported. Commands include: open device / close device / a little faster / slow down / open the light / close the light / dim the light USB+Type-C male input, USB female output. Supports 5V2A devices; data transfer unsupported. Intelligent English control eliminates manual switching for convenience and speed, enabling brightness adjustment of USB lights and fan speed regulation. Primarily designed for USB fans, USB lights, humidifiers, water pumps, USB ceiling fans, and other 5V USB devices. Does not support control of devices with built-in batteries. Powered by various USB sources including adapters, car chargers, and power banks. Specifications: Item: English Smart Voice Control Switcher Support 5V USB/Type-C to USB Female Socket for USB Lamps, Fans Component: Plastic + Metal Size: 4.5x3.5x1.7cm Power: 5V2A 10W USB English voice control switches Support: Type C+USB male input, USB female output Size about 4.5×3.5×1.7cm/1.77x1.37x0.66in ( excluding USB connector) Package Includes: 1PC USB English voice control switcher 1PC USB female to Type C male adapter note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.