1Versatile Slot Support: This tool is compatible with both laptop and desktop memory slots, utilizing LEDs and indicator lights to detect open and short circuits in data and address lines, replacing traditional multimeter measurements. 2Dual Power Mode: Providing dual power options, the tester card can be powered by batteries or by connecting a standard TYPE C cable to a charging adapter or power bank. It allows for simultaneous charging and discharging, with red indicating charging and green indicating full charging. 3Motherboard Repair Tool: Ideal for fixing motherboard issues like no power, no display, or memory read failures, making it a must have for computer laptop, desktop motherboard repairs. 4LED Memory Testing: Using LED lights to test all data cables in the memory module, any hardware failure in these data cable circuits will cause the LED brightness to change. It supports quick charging through battery mounting or TYPE C cable. Simply insert the memory module into the tester's slot, all lights on and consistent brightness indicate no circuit break or short circuit faults. 5Diagnostic Indicator Lights: Blinking lights during testing indicate poor connection with the gold fingers, while no lights suggest hardware open circuit faults. Check gold finger wear, damaged resistors, or PCB circuit breaks. Use the LED numbers to identify pin failures, then use a multimeter to pinpoint specific issues. After hardware testing, address any graphics memory performance concerns and use suitable testing software for graphic memory faults, specifically for desktop for DDR3, DDR4 types. 1 x Tester 1 x USB Cable