This is 10 pairs (25 males, 25 females) of 4 pin polarized, waterproof round connectors. They can easily be soldered on to any length of RGB/WS2801/LPD8806/other LED strips. - 4-pin polarized connector, color coded wires - Rated for up to 24VDC, up to 4A per connector - IP67 rated - PVC Connector & Jacket The wire ends are pre-tinned for easy soldering and upon request I can pre-solder these to any LED product I sell prior to shipping, assuming of course you purchase both these and some length of LED strip from me!Mengxingdianzi