This is a another OEM 2812b led strip for our clients from Ireland total lenth is 200.1mm with 29 pcs ws2811 

IC built in 5050 RGB led black color pcb in 12mm width, looks like a very simple item but the input side soldered 

470 OHM resistors and 1000uF capacitor (Panasonic) to make the voltage and signal stable in application 1m cable 

as a tail for connection ,obviously ,it's for some special project.