The A9 GSM/GPRS is manufactured by the well known Chinese company Ai Thinker and features quad-band GSM/GPRS capabilities. It allows you to easily add SMS, voice, internet connectivity and much more to your next project. You can view the full specifications by following the links listed in the “RESOURCES” section below. Features / Specs Module: Original Ai Thinker A9 Operating Voltage: 3.8VDC – 4.2VDC (4VDC is recommended) Standby Current: < 2mA Operating Temperature: -20℃ to 70℃ GPIO Level: 2.8V Quad-Band GSM/GPRS Frequencies: 850/900/1800/1900MHz GPRS Class: 10 Sensitivity: < -105dBm GPRS Data Service Maximum Data Rates: Download @ 85.6Kbps / Upload @ 42.8Kbps UART Ports: 3 Total (1x Programming UART Port / 1x AT Command UART Port / 1x General Use UART Port) Supports standard GSM 07.07 / GSM 07.05 AT commands and Ai-Thinker extended commands Supports digital audio and analog audio, as well as HR, FR, EFR and AMR speech coding Dimensions: 19.2 x 18.8 x 2.7mm (±0.2mm) Resources Ai Thinker GPRS Modules Info and Resources Ai Thinker GPRS Firmware File, Firmware Flashing Tool, and Operation Manual
