The external joystick was plugged into the adapter card. The adapter is then plugged into the breadboard via the connectors. These devices may be either plugged into regular power outlets, or permanently wired in place. An eSATA or USB device can be plugged into an eSATAp port. Therefore, only normal cables can be plugged into these connectors. If only one computer is required, it can be directly plugged into the modem. A similar isolated switch is used to detect when a microphone has been plugged in. A PC cord must still be plugged into the appropriate PC terminal. Earlier iPod Touch units must be plugged into a computer to be synced. A cord can be plugged into an RJ11W as well. He plugged his guitar in and immediately blew the fuse on the amp. The Echo must be plugged in to operate since it has no internal battery. However, two controllers must be plugged into the PlayStation. A peripheral that allowed 4 controllers to be plugged into the console was also released. This portable machine was plugged into a lighting point.