Specification: Input voltage: DC5-24 V Dimension: 55*26mm Suitable for WS2811, WS2812B, WS2813, USC1903 Feature: Controller configuration Scan the QR code (search for Fairy Nest on Google Play) to download the Fairy Nest App. Open the App & Sign up. Connect your phone or tablet to a 2.4G Wi Fi network. (Does not support 5.0G Wi Fi network) Power up SP501E controller (DC5-24V), & connect the controller to the LED strip. Click + button to configure the new SP501E controller: Input your Wi Fi network password. Pressing & hold the button on the controller until the LED flashes in white. Please keep your phone, the Wi Fi router & the controller closer together to maintain a better signal connection during configuration. After the configuration is completed, the controller will successfully access the Internet. Fairy Nest APPfunction There are 180 dynamic built-in effects with adjustable brightness & speed. You can long press & drag your favourite effects into four slots.8 buttons for 8 special led effects that can be easily called using the Fairy Nest app & can be called via Alexa voice orders. In the static color page, you can combine any static colors using the color ring & the brightness & saturation adjust bars. You can long press & drag your favourite colors into four slots.8 buttons for 8 special led colors that can be easily called using the Fairy Nest app & can be called via Alexa voice orders. Connectto smart speaker 1. Sign in to the Alexa App & get your smart speaker ready.2. Ena