Welcome to the store! Forward and Reverse: This laptop motherboard tester supports both forward and reverse memory slot interfaces, meeting your various daily needs. Scope of Application: This computer memory tester with LEDs is used to repair motherboard failures such as no boot, no display, and no memory read. Light Emitting Diodes: The motherboard memory slot tester uses LEDs to indicate open circuits and short circuits in data lines and address lines. PCB Material: The motherboard memory slot tester is made of PCB material, which is wear-resistant and durable. DDR3 Ports: This computer memory tester is suitable for all DDR3 ports on laptops and can be used with confidence. Item Type: Computer Memory Tester Material: PCB Battery Type: CR2032 Button Battery (not included) Applicable: Laptops supporting all DDR3 interfaces 1 x Computer Memory Tester 1 x User Manual Your 100% satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!