Pixelsticks are small, WiFi RGB Pixel controllers. YOU MUST FLASH THEM YOURSELF TO USE THEM. There are two ways to flash or program a Pixelstick. This video covers using the java tool (TLDR) as well as flashing from the Arduino IDE.
Renard Plus ESP WiFi Pixel Controller Kit: http://renard-shop.com/home/37-es-wifi-pixel-controller.html
Arduino IDE: https://www.arduino.cc/en/Main/Software
Board Manager Link: http://arduino.esp8266.com/stable/package_esp8266com_index.json
ESPixelStick GitHub Repo: https://github.com/forkineye/ESPixelStick
Amazon Links: https://wp.me/P3deDh-fN