We were with this adapter to date on all trips (whether in Central America, South America, the Caribbean, Oceania, Asia and CIS, etc.) well equipped. We have seen the most diverse adapter systems with fellow travelers and all the others were eventually inadequate. We have the adapter slightly "modified" and the two STATED ABOVE edges (Lock) away and never had a problem with a connector. However, the round connectors are tight and you have to press firmly when plugging. Since 1995, the adapter is functioning properly and has not always handled gently in backpacks. We buy and give it away again.
