Sell Cheap 8 port gsm modem pool support at command and imei change multi sim bulk sms device best price

Cheap 8 port gsm modem pool support at command and imei change multi sim bulk sms device Basic Features: 1. quad band 850/900/1800/1900MHz 2. bulk sms sending/receiving 3. unlimited imei change 4. One year Warranty Based on Brand New wireless MTK industrial-grade chipset, 220V power supply, can be a long time stability, generous luxury housing. Can insert 8 SIM cards(big or small). Just like 8 single-channel equipments send messages at the same time Connect computer with a Durable and Portable usb data line Each channel with separate power switch, Easy to Handle and Control, Ports support hot-swapping Professional Technique Person Provide Free After Sales Service Online by teamviewer , One Year Warranty time and lifelong maintenance. If you don't know how to use this item, please inquire before you buy it. Parameter: Dual-band GSM: 850/900/1800/1900 MHz  Frequency  Power Supply: 5-24V DC Input voltage: 100 to 240V Operating Temperature: -20°C - +55°C Storage temperature: -25°C - +70°C Basic Specifications: USB GSM modem pool Build in 8 Gprs modem in one Simbox Based on Sierra industrial modules Asynchronous, transparent or non-transparent, to a maximum 14400 bits / s Bound rate : 300-115200 bits / s Automatic baud rate: from 2400 to 19200 bits / s AT command control ( GSM 07.07 and 07.05)  8x SIM card(big/small) slots Sending Max 4800 messages per hour Comply with GSM phase2 standard Send and receive SMS, AT Command,  Imei Changing Maximum transmitting speed 115KBps Working temperature: -20 to +60 degrees Celsius Storage temperature: -25 to +70 degrees Celsius Double tone multi-frequency function (DTMF) Each channel with separate power switch  Each individual module can be demolished  Industrial chassis, elegant shell Color : black  A, system advantages: Wireless GSM / GPRS / MODEM built on the broad masses of the personal needs of customers on the basis of the enterprises to meet the following requirements: 1, for the majority of customers the same or different delivery information; 2, promptly contact employees issued notices of meetings; 3, to avoid consuming a large number of enterprise human, material and information transfer on time; 4, to avoid high communication costs to be incurred in a month; 5, enterprises and customers (members) between the corporate partners, businesses and staff in the need for more exchanges. B, the system features: Send clusters: can be sent automatically to a large number of goals the same information. Widely distributed: the geographical distribution of the target information widely scattered to support fast: after message, just a very short time can be transmitted to the target. Convenience: the information through the portable phone to receive. Accurate: the message can reach the goal of accurate and timely manner. Exhaustive: the information sent by the computer system, significantly to avoid the artificial missing information. Strong visibil