6 PCS Electronic Accessories: 1 x DDR4 Test Card & 5 x Rocker SwitchDDR4 testing CARDS fully the , for AMD all DDR4 interface board, use leds to indicate that the data line address line open circuit and short circuit.Used to repair is not switched on, does not display, does not read failure such as motherboard, memory is an essential instrument for repair computer motherboardEquipped with battery (CR2032, 3V) insert battery to insert the test card and insert into the corresponding type of motherboard, and insert the CPU motherboard, presses the switch button, test card can assess motherboard memory part of open circuit.Short circuit fault If a lamp is not clear, Could memory and CPU holder or with short circuit, memory slot is damaged If a light, clear, must check the signal and power supply circuitSingle Pole Single Throw (SPST) Contact Type, 3 Pin Terminals, On Off Snap In Rocker Switch.Built in red neon light (light lits when switch is in the on position).Application for it many car, motorcycle, boat, some machine,water dispenser, etc.The light voltage is AC 220V, please pay attention to the voltage before ordering to make sure the rocker switch can work successfully in your area.Item Name : Rocker SwitchPosition : On/OffNet Weight : 8gMaterial:PCB+Plastic+Metalcolour:green+Black+RedPackage Contents:1 x DDR4 Test Card5 x Rocker SwitchOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.