1、30A circuit tester, used to verify that the power supply is properly wired, provides a fault indication, and prevents the wiring error, protecting RV from damage. 2、With LED indicators, display power status, different indicators combinations show different power status. You could clearly found test the power quality before connecting to the RV. 3、The internal use of high quality copper cores to ensure good conductivity, safety, and avoid short circuits. It has been certified by ETL, the performance is safe and reliable. 4、Ergonomic anti‑slip design, easy to use, greatly increase friction, more convenient to plug and unplug. 5、Features compact size, easy to store and carry around with you, which is ideal for your camping travel. Item Type: RV Power Tester Material: Metal + Plastic Model: RM30CD Type:TT-30P Function: To verify if the power source is correctly wired Caution and Warning: 2. Before plugging your circuit tester into the power pedestal, make sure the corresponding circuit breakers are in the OFF position. 3. After the circuit tester is inserted in the power pedestal, flip the corresponding circuit breakers to the ON position. condition will not change, the tester can be removed from the power pedestal after using. 5. If the power pedestal wired incorrectly, contact the person in charge or professional maintenance personnel. And ensure to test the power pedestal again before using. 6. The tester has no surge protector function 7. Use in dry location 1 x RV Power Tester 1 x Manual