and Features: Automotive relays test tool. Through the continuous automobile battery (11V-15V) to the relay coil, the detector can properly check the relay contact function. The tester observes contact data, closure for time, relay inertia at each test stage, etc. Test to properly control the opening and closing of the relay. If the relay is abnormal the red LED will light, it's normal the green LED will light. Fine workmanship and good performance. Easy to operate. Convenient to carry. Durable in use. Specifications: Material: Plastic and Metal Color: Black and Red Voltage: 12V Size: approx. 110 x 60 x 28mm Quantity:1 pc Note: No retail package. Transition: 1cm=10mm=0.39inch. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Relay Tester(other accessories demo in the picture is not included.) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.