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- Adopts SIM900 quad-band GSM/GPRS module, expands GSM/GPRS function for Arduino main control board; With this expansion board, Arduino can send / receive messages as well as achieve GPRS data communication; - Switch on board for ports option: SIM900 serial port or SIM900 debug port; If choose Debug, then you must use Arduino hardware serial port to control, analog serial port is invalid; Farad capacitors on board are designed to supply power for RTC; - Toggle Debug switch, can setup the SIM900 Debug port to connect to Arduino or setup it to connect to PC through the ATMEGA8U2/FT232 on Arduino; - 3.3V and 5.5V automatic level compatible, self-adaptive to 3.3V or 5V main control boards, supports development boards based on other 3.3V platforms, such as leaf maple and Chipkit; - After connecting to the Arduino board, you must use a 9V/2A DC power supply; Otherwise, it can not work; - Quad-band supported: GSM/GPRS 850/900/1800/1900MHz  
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Shipping fees include handling and packing fees as well as postage costs. Although you order at your own risk, but special care is taken to protect fragile objects. Boxes are amply sized and your items are well-protected.
Parcels will be shipped out within 1-3 working days after payment has been confirmed (Public holidays and weekend are not included) .
The confirmation from the parties will be via the e-mail. Please update your latest contact phone number and the exactly shipping address with us to avoid unnecessary incident.
You will receive the tracking number so that you can track your order online or call the courier service directly. If you do not receive your item on time, please contact us immediately for further assistance.
Please check the contents of the parcel before signing your goods.
Please transfer the exact amount to us so that we can ship your goods on time.
Ex- stock items subject to prior sales.
Goods sold are not refundable or exchangeable. All items will be checked before shipping out to ensure it is perfect working condition. No warranty cover for Electronic products.
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