ELEGRP
This is a repair or upgrade part for RV or campsite wiring, not a travel essential. If your existing outlets and fittings work, there is nothing to do.
RV owners repairing or adding power points.
The title gives a pack size of 1. Confirm on the Amazon listing.
ELEGRP GFCI Outlet 20 Amp, Self-Test GFI Electrical Outlet with Thinner Design, TR Tamper Resistant GFCI Receptacle, Ground Fault Circuit Interrupters with Wall Plate, UL Listed, Matte Black, 1 Pack (ASIN B0CJ993L8M). Amazon's page has the current price, specs and reviews.
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Check current Amazon listing (ASIN B0CJ993L8M).
Fine print: The Dude has not personally tested this product. The details on this page come from the Amazon listing and can change; check the listing for the current specs, price and availability.