Description Perfect fit for all windowsEasily adjust the retractable curtain box for a snug fit, even with measurement errors. Covers window widths from 22.8\” to 72.8\”. Replaceable roller blind fabricsSwitch fabrics effortlessly to match your style or functionality needs. Keep your current curtains by upgrading only the motor unit. Smart and remote control optionsControl blinds via app, voice, remote, or wired controller. Supports group control for up to 8 blinds per group, perfect for large spaces. Battery-free convenience with solar powerInstall the optional solar panel for unlimited power. Even without it, a full battery charge lasts up to 8 months. Ultra-quiet operationThe DC motor ensures whisper-quiet performance, with noise levels as low as 30dB in silent mode. Matter and smart home integration (SwitchBot Hub 2 required)Compatible with Alexa, Google Assistant, Siri Shortcuts, and more. Supports percentage control for precise adjustments, offering personalized settings for your smart home needs. Compatibility & Installation Choosing the Right Size for Your Roller Shade: For precise measuring instructions, please visit the product details page. Installation Video: Watch Video> Smart Home Integration With SwitchBot Hub 2 (sold separately), Roller Shade supports Matter and can be integrated with Apple HomeKit. Warranty SwitchBot Roller Shade is covered by a 1-year warranty.