Our new economic serial GPRS AMI/AMR modems are just presented for sale with new specifications of quad Band, low cost,recording log up to 2 years , 85-265VAC large feed pitch, remote configuration management and improved SMS modul. Here http://www.aktifenerji.com.tr/tr/urunGrup/22/gprs-3g-vimax-modem, you can reach detailed information and specifications about them. (03.03.2015)