The Smart & Green Flatball Bluetooth XXS LED Indoor/Outdoor Lamp is a soft, flattened sphere of durable, waterproof polyethylene. It houses an energy efficient color-changing LED to create a range of lighting effects. While one is adorable all by itself, a cluster of Flatballs XXS has a particularly magical effect--especially when floating in a pool. To change the color, dimming, scheduling and even have multiple products communicate with each other, simply download the Smart and Green app. Using Bluetooth mesh technology without a WiFi network, you can control various scene modes from your own smartphone.