4/2 A, for cars with engines up to 2.0 6V and 12V Suitable for batteries: Lead acid, Gel, Calcium, AGM, EFB, START/STOP IP65 INSTRUCTIONS "MODE" button: Mode "1" - 6V 2A Mode "2" -6V 2A (Winter mode) Mode "3" -12V 2A Mode "4" -12V 2A (Winter mode) Mode "5" -12V 4A Mode "6" -12V 4A (Winter mode)