Buying iPad in USA to use in Perú

All Apple iPad USB power adapters are designed for use with power sources rated to provide 100V AC to 240V AC at 50Hz to 60Hz. Apple iPad USB power adapters also comply with the IEC/UL 60950-1 and IEC/UL 62368-1 standards for use with power sources rated to provide 115V AC at 400Hz (typically found onboard commercial airlines).

While your Power Adapter will be fully usable when travelling internationally, you may require a simple pin-adapter to allow the Power Adapter to be used with AC power outlets in different countries. Travel adapters are readily available.

Warranties may be problematic. Devices purchased in some countries, such as the US, don't necessarily benefit from Apple's International Warranty provisions. Apple's US Warranty terms are documented here:

Legal - iOS Warranty Document Us - Apple

the ac chargers works from 110volt ac to 240volt ac a plug changer may be required if peru use different connectors than usa

the warranty will only be valid in usa