Wireless cellular frequency: GSM 900 and 1,800MHz Supports TCP, UDP, SMTP, POP, ICMP, FTP, PPP, DHCP and DNS protocols Band rate: 1,200 to 115,200bps Antenna: 50Ω SMA female interface Serial port: (RS232, RS485) USB2.0 Power supply: 5 to 25V DC Typical: 9V DC/1A Power consumption: Peek: