Four Slot Ethernet/Charging Cradle- Allows speeds up to 1 Gb - Uses less power than CRD9000- 4001ER - Does not charge spare batteries. - No communications support when using MC9300. Will only serve as a Charge-Only cradle when used with MC9300. Does not support fastcharging of MC9300. - USB connection to terminal, Ethernet connection to LAN - USB Client connection to MC90xx - requires Econnect (MC906x) or IDockIt (MC909x) software on device.