The Zebra ET50/51 55/56 8 inch docking station features draw latches to ensure the tablet is kept in place. Guide pins on the front make it easy to put the tablet into the docking station correctly and ensures there is full connectivity. The tablet’s scanner, hand strap, battery bay, and stylus all work with the docking station. This dock features a powered RS232 port to connect hand-held or mobile computers, scales, scanner guns, or printers. Port Replication: RS232 serial power on pin 9 - 1 amp, HDMI 19 pin, Power input, USB (1.1A charging), USB 3.0, Ethernet RJ45 (1).