Compare the plug shapes, voltage and frequency in El Salvador and San Marino, and find out which adapter you need before you travel.
Adapter required
Yes — coming from El Salvador, you will need a travel adapter for San Marino. El Salvador uses Type A/Type B plugs, and San Marino uses Type C/Type F/Type L, so the pin shapes will not fit any wall socket. Voltages differ (120 V at home vs 230 V abroad), so check the label on each device. Most modern dual-voltage chargers handle the swing without a converter, but heating appliances usually do not. The mains frequency is also different (60 Hz vs 50 Hz). This rarely matters for electronics but can affect motor-driven devices like clocks and shavers.
El Salvador (home)
San Marino (destination)
Electrical specifications in San Marino
More about plugs in San Marino
In San Marino, the standard power plug is Type C and Type F and Type L. The country runs on 230 volts at 50 Hz. That means wall sockets in San Marino can be one of 3 different shapes — Type C, Type F, Type L, and your plug needs to physically match the socket to fit.
Full San Marino plug guide