Mini GSM / GPRS breakout board is based on SIM800L module, supports quad-band GSM/GPRS network, available for GPRS and SMS message data remote transmission.
The board features compact size and low current consumption. With power saving technique, the current consumption is as low as 1mA in sleep mode.
It communicates with microcontroller via UART port, supports command including 3GPP TS 27.007, 27.005 and SIMCOM enhanced AT Commands.

Features:
Mini GSM / GPRS breakout board based on SIM800L module
Supports quad-band GSM/GPRS network
Compact size and low current consumption,1mA in sleep mode
Communicates with microcontroller via UART port
Supports commands including 3GPP TS 27.007,27.005 and SIMCOM enhanced AT commands
Quad-band 850/900/1800/1900MHz
Make and receive voice calls using a headset or an external 8Ω speaker and electret microphone
Send and receive SMS messages,GPRS data (TCP/IP, HTTP, etc.),FM radio broadcasts
Lead out buzzer and vibrational motor control port
AT command interface with “auto baud” detection
Working Voltage:3.5~4.2V
Dimensions:0.98 in x 0.91 in x 0.28 in (2.5 cm x 2.3 cm x 0.7 cm)
Weight:0.18 oz (5.2 g)

About 3G PCB Antenna:
Suitable for SIM800L GSM modules / Arduino SIM900 GPRS Shield.
Frequency: 780MHz~960MHz, 1710MHz~2170MHz.
Antenna gain: +2.0+/-0.7dBi @ 880 MHz, +2.0+/-0.7dBi @ 1800 MHz.
S.W.R <= 2.0 @ 2100MHz~2500MHz.
Output Impedance: 50Ohm.
Extension cable interface: IPEX.