Individually Addressable. Each LED can have its own color and brightness. You can control each LED individually and set it to any color or animation you want.
It can be programmed with Arduino, Raspberry Pi, FadeCandy, T1000S etc. It can also be controlled by SP105E, SP103E, HC008 and other pre-programmed WS2811 controllers.
IP68 waterproof. Each RGB LED and controller chip is sealed in silicone. They are weatherproof and rugged. You can put them outdoor, even underwater.
Each strand has two 3-pin JST SM connectors so you can connect multiple strands in a row, just watch for how much current they want. Each pixel can be cut off. So you can shorten or extend the distance between two pixels.
They're typically used to make outdoor advertising signs, led screen, led wall, advertising board and widely applied to hotel, KTV, bars, wedding, party atmosphere lighting.