Fast And Free Nib Caja De Toques Mexican Electric Shock Machine Box By Steren. Take this to gatherings or parties with your family and friends for some great fun. You don't need to put it together or assemble it, just take it out of the packaging to get the fun started. It has 10 intensity levels, an on / off button, and a functioning indicator LED. It is reliable and very safe, however it should not be used with people who have pacemakers, blood pressure problems or pregnant women.