Frequency: Gsm 900/1800 Output power Class 4: 2w @ 900 Class 1: 1w @ 1800 Specification for csd data transmission: Up to 14.4 kbit/s V.110 Non-transparent mode Ussd support Specification for voice:triple-rate codec for hr, fr, efr, amr Basic hands-free operation Echo cancellation Noise reduction With tcp/ip stack, ppp, udp Internet services: http, ftp, smtp, pop3 Control via at commands Sim application toolkit Specification for sms: Point-to-point mo and mt Sms cell broadcast Text and pdu mode Specification for fax: Group 3, class 1, 2 Supply voltage range: 7-30 v Temperature range Normal operation: -20°c to +70°c Restricted operation: -25°c to +75°c Switch off: +80°c Storage: -40°c to +85°c Size: 65x74x33mm Weight: 95g Operating status led