... based interface allows a variety of controls including: i. Content updates, ii. Changes to the transmission configuration ... .Optional wireless accessories are required for the following. i. 802.11 ii. GPRS iii. CDMA and 3G ... exclusive of antenna)Bluetooth Specification:1).Class 1 Bluetooth module with 4 external antenna2).Bluetooth 2.1 + ... Airports, bus stations Bluetooth Advertisement Unit(BTP-112-4x)