Manufacturer : Multi-Tech Systems Inc. Manufacturer Product Number : MTSMC-G-F4 Detailed Description : Cellular GPRS, GSM Transceiver Module 850MHz, 900MHz, 1.8GHz, 1.9GHz Antenna Not Included, MMCX Through Hole Frequency : 850MHz, 900MHz, 1.8GHz, 1.9GHz Data Rate : 115.2kbps Voltage - Supply : 5V Current - Receiving : 400mA Current - Transmitting : 400mA Mounting Type : Through Hole Operating Temperature : -30°C ~ 70°C