Description:Input voltage: 3.3V/5V only needs a set of power supply. Built in level conversion function. If you use MCU 5.0V and Bluetooth module communication, 5.0V power supply port, TX RX logic level 5V If you use MCU 3.3V and Bluetooth module communication, 3.3V ..
Features:100% New and High QualityModel: SIM800LWork voltage: 3.7~5VNetwork support: Quad-Band 850 / 900/ 1800 / 1900 MHz - would work on GSM networks in all countries across the world.TTL serial interface compatible with 3.3V and 5V for MCU Microcontrollers,competible with for . Package includ..