Item Type: GPRS Serial Device Server_x000D_ Material: Aluminum alloy_x000D_ Model: HF-2111_x000D_ Unlimited Parameters: _x000D_ Standard: GSM/GPRS_x000D_ Speed: 85.6Kbps (DL, UL)_x000D_ Frequency Band: 850/900/1800/1900MHz_x000D_ Multi-Slot Class: GPRS Class 12_x000D_ Terminal Device Class: Class B_x000D_ Coding Method: CS1, CS2, Cs3, CS4_x000D_ Maximum Transmit Power: _x000D_ GSM850/GSM900: Class 4 (2W)_x000D_ DCS1800/PCS1900: Class 1 (1W)_x000D_ Application Mode: AT command set_x000D_ Network Protocol: TCP/UDP_x000D_ Number Of Network Connections: 3_x000D_ SIM Card: 1.8V/3V_x000D_ Interface: SMA (female, 50)_x000D_ Hardware Parameters: _x000D_ Data Interface: 1 RS232/RS422/RS485_x000D_ RS232: Gold-plating male DB9 connector_x000D_ RS485/RS422: 5.08mm terminal block_x000D_ Data Bits: 5, 6, 7, 8_x000D_ Stop Bit: 1, 2_x000D_ Check Digit: None, Even, Odd_x000D_ Baud Rate: 1200bps~115.2Kbps_x000D_ Flow Control: RTS/CTS_x000D_ Cache: 1K_x000D_ Size: Approx. 95 x 65 x 25mm / 3.7 x 2.6 x 1in_x000D_ Working Temperature: -40~85_x000D_ Input Voltage: DC9-36V_x000D_ Working Current: ~400mA_x000D_ Power Consumption: