You are purchasing one new and not used AROMAT (PANASONIC) part number RSL2D-5V miniature PC mount LATCHING relay. They are SPDT, contacts rated for 1 amp @ 30V DC resistive or 0.3 amp @ 125 VAC resistive load. These relays have a one form C set of contacts. They have two 5 VDC coils. When one coil is energized it latches the contact open and when the second coil is energized it latches the contact closed. These relays are normally used in PC boards. These are excess discontinued distributor inventory.