Buyer NOTE: Default shipping 5V
The studio launched an enhanced version of the fourth edition of SIM900A module, has been released, this module without positioning, on-board antenna, can send and receive SMS, GPRS data, transparent transmission, a variety of packages available, free shipping free shipping! ! Pure selling at a loss! ! ! Large dwell
Onboard a giant tantalum, copper antenna, automatic power circuit, circuit card replacements charged, the headset microphone input and output, the sleep circuit, reset circuit.
About Power
5V version: This module supply range 4.5V ~ 5.5V, you can use USB3.0 or 5V switching power supply module for GSM, but remember, do not be greater than 5.5V, otherwise it will burn! ! !
4.2V version: This module supply range 3.5V ~ 4.8V, the module can be powered by a lithium battery to, but remember, do not be greater than 4.8V, otherwise it will burn! ! !
About Serial
This module is TTL level interface, can be directly connected to the MCU, ARM, without conversion devices, and computer links need USB to TTL module to communicate, not with RS232, RS485 and other serial link, the module will burn! !
About Power:
Shutdown Current: 4mA (reset pin GND connection under circumstances)
Working Current: 50mA (average)
Standby current: 20mA (transition 0 ~ 20ma)
Maximum current: 120ma (registration period)
Logistics information
Our products are located in Hong Kong, China, and the logistics speed depends on your specific location. According to our experience, it usually takes about 15-20 days of transportation time
CONTACT US
RETURNS POLICY
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SHIPPING
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Curabitur vel sem mi. Proin in lobortis ipsum. Aliquam rutrum tempor ex ac rutrum. Maecenas nunc nulla, placerat at eleifend in, viverra etos sem. Nam sagittis lacus metus, dignissim blandit magna euismod eget. Suspendisse a nisl lacus. Phasellus eget augue tincidunt, sollicitudin lectus sed, convallis desto. Pellentesque vitae dui lacinia, venenatis erat sit amet, fringilla felis. Nullam maximus nisi nec mi facilisis.
How to choose the correct size:
Step 1 Please measure your foot length carefully.
Step 2 Please choose the correct size according to your foot length and chinese size.
For example, If your foot length is 255 mm , you should choose the size 8.
