The electrical current in Peru is 220 volts, 50 cycles alternating current (AC). A converter is needed for appliances requiring 110 voltage. U.S.-style flat prongs fit most outlets.
Consider buying a universal adapter, which has several types of plugs in one lightweight, compact unit. Most laptops and mobile phone chargers are dual voltage (i.e., they operate equally well on 110 and 220 volts), so they require only an adapter. These days the same is true of small appliances such as hair dryers. Always check labels and manufacturer instructions to be sure. Don't use 110-volt outlets marked "for shavers only" for high-wattage appliances such as hair dryers.
Global Electric & Phone Directory. You'll find information on electrical and telephone plugs at the Global Electric & Phone Directory. www.kropla.com.