... without being disturbed. When the phone jammer is turned from on to off, all cell hand phones will automatically ... AC power or battery power ■Electrical power and recharging from AC charger (110/220V)Package Contents ■1 x Signal ... .really amazing, good,3.This device works well when I'm driving on the way. no worries of being kept ... , THE QUALITY IS GOOD7.Great product, nice price, i like it very much.