It's addressable SK6812 RGBW led rigid bar,DC5V, the PCB size is 500*21.4*0.7mm, each PCB has 

30pcs LED chip.

2.both end solder female connector, and connect 2pcs PCB via a male connector to achieve seamless joint.

Our customer will mounte these PCB in aluminum profile, and they don't like the connector over the end 

of PCB, so we will design the bonding pad more inside, and select a longer male connecotor for fast and 

easy connection.