The hot-melting inner adhesive seals watertight when the overlap is correct - the soldering ring connects the two conductors during the shrinking and melting process! The advantage of the transparent design is that you can see the wrapped object. The application is very simple: Strip the cable and insert it into the plug on both sides until the stripped cable ends overlap or twist under the soldering ring. Even heating in the melting temperature on the solder until it is melted - preferably with a hot air gun or a hot air blower - ready. The maximum current is limited by the conductor cross-section of the cable used, its conductor material and the quality of the solder joint.This text is machine translated.