1ANENG Brake Fluid Tester Handheld Oil Digital Display Screen Audible/Visual Alarm BF01+RT01 Digital Relay Detection Test Kit. RT01 ntroduce 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.
