No soldering required. Size is approximately 16cm long. Can be used for 2-wire wiring of single-color LED strip lights. This is an extension cable for 3528 single-color LED strip lights with a tape width of 8mm. The cable length is 15cm. It can also be used at corners. It is also convenient as a cord to avoid obstacles such as pillars when connecting two pieces together for use on the exterior walls of your home, the interior of your store, etc.