SKU: 36836715347

SIM900A SIM 900A V4.0 Kit Wireless Extension Module GSMGPRS Board Antenna Tested Worldwide

Sale price$14.40 Regular price$16.00
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Description

SIM900A SIM 900A V4.0 Kit Wireless Extension Module GSMGPRS Board Antenna Tested WorldwideThe SIM card circuit to increase the SMF05C ESD chip. Antenna circuit: guarantee short and straight, so as to ensure the signal strength. PCB display screen printing mark: each interface, convenient development two times, the SIM900 A hardware is completely follow the design when the design manual. Two power supply interface: VCC5, 5V DC above 1A. Computer 5V power supply can be early computer USB. DC long data circuit over larger recommended 5V1A.

The SIM card circuit to increase the SMF05C ESD chip.
Antenna circuit: guarantee short and straight, so as to ensure the signal strength.
PCB display screen printing mark: each interface, convenient development two times, the SIM900/A hardware is completely follow the design when the design manual.
Two power supply interface: VCC5, 5V DC above 1A. Computer 5V power supply can be early computer USB. DC long data circuit over larger recommended 5V1A. VCC4, 3.5--4.5V power supply, ibid., suitable for lithium battery.
A TTL level, compatible with 3.3V and 5V.
The two antenna interface, the default SMA straight head, connector for IPXmini antenna.
One way of speech interface, the way Mike interface.
The control interface of each pin description:
GND - GND
SIMR SIM900A RXD, TTL level, can not be directly connected to the 232 level
SIMT SIM900A TXD, TTL level, can not be directly connected to the 232 level
RST - SIM900A reset, active low
VCC_MCU when the SIM900A module and 5V TTL level communication, this pin is connected to DC 5V; when the level of communication of SIM900A and 3.3V TTL, this pin is connected to DC 3.3V.
Onboard Resources:
Serial port circuit(with protection)
Antenna interface circuit(SMA bend female port)
SIM card circuit(flip SIM slot)
4*3.5 fixture hole 4pcs
SIM900A serial port output terminal
Dimensions & Weight: 5.6 cm x 4.9 cm x 2.8 cm/23 g

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SKU: 36836715347

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Jason Vorbeck
Draper, US
★★★★★ 1
Buy something better
This relay has experienced failure again after just a couple of months of use. It's not the mag coil that fails but rather the contacts are of such low quality that they corrode beyond their ability to conduct power, and fast. I have had to change two of these so far and am on the third one. The seller will ship replacements but who wants to keep replacing them? I have to travel in my RV with a spare. This relay has never been exposed to the elements. It's safely mounted inside a sealed bay. Be aware of any brands that look like this, they are all the same.
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Reviewed in the United States on November 15, 2025
D
Verified Purchase
Dave Kulina
Lake Worth, US
★★★★★ 5
Works great
I added extra batteries to run a truck camper without killing my main battery and this works great. Simple to install and i have no had any problems in the pay few months and i use it every single day
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Reviewed in the United States on April 18, 2021
A
Verified Purchase
Amazon Customer
San Leandro, US
★★★★★ 5
Installed in my RV.
This product works well. It is somewhat difficult to mount. The contact points are a little too close together. These deficiencies are understandable given its low cost and small size.
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Reviewed in the United States on January 18, 2021
K
Verified Purchase
Kyle Seal
Birmingham, US
★★★★★ 5
Good quality
Used this to relocate my battery to the rear of my longbed truck, flexible and easy to work with
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Reviewed in the United States on March 23, 2026
J
Verified Purchase
J. McCoy
Waukegan, US
★★★★★ 5
Good stuff.
Great wire for the cost. Works perfect for my project.
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Reviewed in the United States on December 28, 2025

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