Sharp ELSI Mate EL-826 Solar Cell Calculator Tested HTF Rare Sticky "ON" Button The "ON" button sticks, but turns on. Item is tested and in good used working condition. Used items may show some scuffs, wear, scratches, blemishes, rust, staining, fading, glazing, cloudiness, dirt, dust, pitting, discoloration, etc. Used items will need to be cleaned prior to use. Please review the pictures carefully and ask questions before ordering this item. The multiple high definition (HD) pictures clearly show the condition of the item. Unless indicated in the listing or in the pictures; bolts, nuts, screws, caps, plugs, washers, bulbs, accessories, wiring, chargers, charging cables, batteries, etc. are not included. Please verify the item number.