Sold as 1 Each. Protection for workstations, desktop PCs, telecom systems and other sensitive electronics. Shields connected equipment from damage and performance problems due to transient surges. Diagnostic LED. Shields equipment from surges and line noise. Keyhole mounting tabs. Gain economical AC surge suppression for protection of workstations, desktop PCs, telecom systems and other sensitive electronics. Built-in AC surge suppression shields connected equipment from damage and performance problems due to transient surges. Diagnostic LED warns of suppressor damage. AC suppression shields equipment from surges and line noise. Keyhole mounting tabs offer convenient protection of desktop computer equipment and accessories.