SIM900 GSM GPRS Serial Module for Arduinoo ESP8266 STM32 Quad Band

New Chip SIM900 (bukan 900A) SIM900 Quadband GSM GPRS Serial Module for Arduinoo/ESP8266/STM32/ESP32/Raspberry IMEI Not Registered Quad-Band 850 / 900/ 1800 / 1900 MHz - would work on GSM networks in all countries across the world. *GPRS multi-slot class 10/8 *GPRS mobile station class B *Compliant to GSM phase 2/2+ *Class 4 (2 W 850 / 900 MHz) *Class 1 (1 W 1800 / 1900MHz) Control via AT commands - Standard Commands: GSM 07.07 amp; 07.05 -Enhanced Commands: SIMCOM AT Commands. Short Message Service - so that you can send small amounts of data over the network (ASCII or raw hexadecimal). -Embedded TCP/UDP stack - allows you to upload data to a web server. -RTC supported (battery Exclude) -Selectable serial port. -3.5mm Speaker and Headphone jacks -Low power consumption - 1.5mA(sleep mode) -Industrial Temperature Range - -40C to +85 C -Size:8.5x5.7x2cm(approx)