Back view

1.	Back cover (back output tray)
2.	AC power connector
3.	HL-2150N / HL-2170W: Network status LEDs (Light Emitting Diodes)
4.	HL-2150N / HL-2170W: 10/100BASE-TX port
5.	HL-2170W: Wireless setup button
6.	USB interface connector