These are addressable 5-meter-long 5V RGB LED strips that come packed with 300 APA102Cs. APA102 LEDs are very similar to WS2812s with a few caveats: APA102s can be controlled with a standard SPI interface, and they have an extremely high PWM frequency. There is access to each APA102 LED, and each strip length can be easily modified. You will be able to control each LED RGB individually, giving you the ability to create cool lighting effects for your car or perhaps under-cabinet lighting in your kitchen!
Note: These come in 5m segments on a reel. They are preterminated with 0.1" spaced 4-pin connectors, as shown in the pictures.