Going In Style Costa Rica Travel Adapter Plug Kit A Non-grounded adapter plugs allow electrical connections up to 240 volts An adapter plug does NOT change the current or voltage (this requires a converter) unless your appliance is dual voltage This adapter may NOT be used with appliances that have grounded plugs; for these you will need a grounded adapter. Charge your cell phone, tablet and e reader while staying in Costa Rica One nongrounded Costa Rica adapter plug for traveling