Thumb Score: +16

Amazon [amazon.com] has Klein Tools GFCI Outlet Tester with LCD Display (RT250) for $19.98.
Shipping is free with Prime or on $35+ orders.

amazon.com/dp/B08QW7K1JJ [amazon.com]

Available from:
[LIST][*]Amazon [amazon.com][*]Lowe’s [lowes.com]