"Professional-Grade Relay Tester! ANENG RT01 – Test 4 Pin & 5 Pin Automotive Relays in Seconds, No Battery Needed!". ANENG RT01—— RT01 can quickly detect whether your relay is normal.It is easy to use and suitable for general-purpose automotive relays on the market.Durng testing, it needs to be connected to a 11V-25V battery in the car.
