Parameter
Model: WS2812 pixel board
light source: SMD 5050 RGB
plate: aluminum plate
IC Model: WS2812B
the gray level: 256
Beam angle: 120 °
Color: full color, can be adjusted by the controller as follows: white, red, yellow, blue, green, etc.
The standard operating voltage: DC 5V
Power: 0.3W ± 0.01%
Waterproof: not waterproof
FPCB board size: Length:0.36in , Width: 0.36in, thickness: 0.11in
FPCB board color: white

Kindly note
None of the LEDS are connected through the PCB. So you need to solder them based on your requirement. There are 6 solder points on the back of LEDs.
Arduino is not included.

Package:
100pcs WS2812B LED mounted on white PCB Board

• Fully addressable (each LED can have it's own color and brightness), 256 brightness display and full 24-bit color display
• Compatible with the Neopixel Arduino library
• Works great w/ Arduino and is easy to program, because the addressable IC is built-in the 5050SMD and it makes this led module to light up each individual 5050SMD at your wish
• These 5050 RGB LED Module Pixels are digitally-controllable lights you can set to any color, or animate. The color of the light were highly consistent, cost-effective
• Superior quality and competitive price

Fully addressable (each LED can have it's own color and brightness), 256 brightness display and full 24-bit color displayCHINLY