SIM900 SIM 900  GPRS/GSM Shield Development BoardQuad-Band Module
SKU: 26756074723

SIM900 SIM 900 GPRS/GSM Shield Development BoardQuad-Band Module

Sale price$24.30 Regular price$27.00
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Description

SIM900 SIM 900 GPRS/GSM Shield Development BoardQuad-Band ModuleSIM900 GSM GPRS shield is based on a chip of SIM900 from SIMCOM and is compatible with Arduino and its clones. It is used to make and receive phone calls, send and receive SMS and connect to the internet using the GPRS network via UART using AT commands. It supports quad band and can communicate through GSM 850 MHz, GSM 900 MHz, DCS 1800 MHz or PCS 1900 MHz networks. It has a power jack along with a toggle switch to use an external power supply.

SIM900 GSM GPRS shield is based on a chip of SIM900 from SIMCOM and is compatible with Arduino and its clones. It is used to make and receive phone calls, send and receive SMS and connect to the internet using the GPRS network via UART using AT commands. It supports quad-band and can communicate through GSM 850 MHz, GSM 900 MHz, DCS 1800 MHz or PCS 1900 MHz networks. It has a power jack along with a toggle switch to use an external power supply.

SIM900 shield can be powered by a 5V power supply that can provide 2A current, or 9V 1A or, 12V 1A supply. It is equipped with a microphone and speakers jack for phone calls. At the backside of the shield, there is a sim card jack and a holder for a 3V CR1220 battery for the RTC (real-time clock). After insertion of sim and battery, the shield can be mounted on top of the Arduino board.

Features:

  • Compatible with Arduino and its clones
  • Quad Band 850 / 900/ 1800 / 1900 MHz GSM network
  • Can send and receive SMS, MMS, GPRS and audio using GSM network.
  • Supports UART interface
  • AT commands
  • Embedded TCP/UDP stack facility for uploading data to a web server
  • RTC support
  • Speaker and Headphone jacks
  • Equipped with 12 GPIOs, 2 PWMs, and an ADC

Specifications:

  • Supply voltage: 3.4V-4.5V
  • Low power consumption: 1.5mA(sleep mode)
  • Industrial temperature range: -40⁰C  to +85⁰C
  • Class 4 (2 W @ 850 / 900 MHz) , Class 1 (1 W @ 1800 / 1900MHz)
  • Dimensions: 8.5 X 5.7 X2cm(approx)
Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 26756074723

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Benjamin Butler
San Leandro, US
★★★★★ 5
Best socks ever
Size: Large, Color: (100) White / White / Mod Gray
Best athletic socks I’ve bought. I usually buy UA socks anyway and these are the best. Super soft and comfy. Fit snug and my feet don’t slide around in them.
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Reviewed in the United States on February 9, 2026
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Sigrid Inger
Bozeman, US
★★★★★ 5
Much much better than the standard sock
Size: X-Large, Color: (001) Black / Black / Castlerock
These socks are superb. Lots of padding in the right places, snug where it should be snug & loose where you don't want it to bind. They are marked with an 'L' for left foot, & 'R' for the right foot (it makes a difference in the fit being perfect. They stay up on your heel & don't slide down
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Reviewed in the United States on April 20, 2026
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Chris
Dallas, US
★★★★★ 4
4 lefts vs 2 rights
Size: Medium, Color: (001) Black / Black / Castlerock, Size: Medium, Color: (001) Black / Black / Castlerock
I ordered a set of three. I ended up with four left socks and two right socks lol. Granted it doesn’t matter unless you’re OCD. JEEZ. Love the socks but not the attention to detail the sock company did on matching left/right marked socks.
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Reviewed in the United States on May 28, 2026
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Jill
New York, US
★★★★★ 5
My favorite socks
Size: Medium, Color: (001) Black / Black / Castlerock
I love love, love the left and right socks one has an L one has an R and they fit so well and they’re so comfy for running jogging or walking. They are my favorite socks.
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Reviewed in the United States on January 8, 2026
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vbgirlfla
Belleville, US
★★★★★ 5
Hold up to tough wear - definitely recommend
Size: X-Large, Color: (001) Black / Black / Castlerock
These are my teens favorite socks. We've ordered multiple sets. Given that he tends to wear then as slippers I am really impressed with how they hold up. The extra large size is great for bigger feet. They wash well and I didn't notice any shrinkage, fading or pilling. This set is going to college with him.
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Reviewed in the United States on April 1, 2026

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