Network Support: GSM 850 MHz 900 MHz 1800 MHz 1900 MHz -Standard RJ-11 ( FXS) to telephone or VoIP gateway & PABX -4SIM automatic rotator ( 8 CHL 32 SIM cards) ( optional) -Rotator by really clock ( 4 time clock) -Rotator by dial times -Rotator by total talking minutes -Rotator by working hours -IMEI changing function. ( You can change the IMEI to any 15-digital code.) -Call Forwarding -Caller ID -Callback Function -Provide accurate anti-polarity signal -Support DTMF -Support 2ND Stage Dialing -Polarity reversal -Barred telephone numbers can be set flexibly -Locking wireless terminal, Locking SIM card, Locking districts and locking network -Simple to install and easy to maintain -High-quality voice -Enhanced high gains external antenna -Wide voltage range & Low power consumption -Separate Power On/ Off controller Contact person: Rebecca Email:dugylogic[at]gmail[dot]com MSN:szrunsunsale01[at]hotmail[dot]c om Tel:+8613554760049 86-755-29740122 Web:www.szrunsun.com