Protect all electronics from damage and performance problems due to surges and spikes. Transformer-friendly design accommodates at least one large transformer plug without covering remaining outlets. Diagnostic LED warns of suppressor damage. Keyhole mounting tabs offer convenient protection of desktop computer equipment and accessories. Number of Outlets: 6 AC; 2 USB; Joules Of Surge Protection: 990 J; Lines: 3; Jacks/Ports: USB.