Rear

1. System status indicator	The indicator in the ThinkPad logo on the computer lid shows the system status of your computer. Blinking for three times: The computer is initially connected to power. On: The computer is on. Off: The computer is off or in hibernation mode. Blinking rapidly: The computer is entering sleep or hibernation mode. Blinking slowly: The computer is in sleep mode.
2. Nano-SIM-card tray*	Use the Nano Subscriber Identity Module (SIM) card to connect to a wireless-WAN network. See Connect to a cellular network (for selected models).

* for selected models