PRS Shield power supply: 5V Size: 68.33x53.09mm (like the for Arduino UNO size) GPRS multi-slot class: 10/8 GPRS mobile station: class B Fully compatible with for Arduino UNO and Mega2560 development board series Serial port communication, freedom choose hardware serial port (D0/D1) or software serial port (D2/D3) and the motherboard communication mode SIM900, all IO all set aside, not only the UART port, DEBUG port, GPIO port and KEY all, PANEL interfacePRS Shield power supply: 5V Size: 68.33x53.09mm (like the for Arduino UNO size) GPRS multi-slot class: 10/8 GPRS mobile station: class B Fully compatible with for Arduino UNO and Mega2560 development board series Serial port communication, freedom choose hardware serial port (D0/D1) or software serial port (D2/D3) and the motherboard communication mode SIM900, all IO all set aside, not only the UART port, DEBUG port, GPIO port and KEY all, PANEL interface **SPECIFICATIONS** GENERAL PRS Shield power supply: 5V Size: 68.33x53.09mm (like the for Arduino UNO size) GPRS multi-slot class: 10/8 GPRS mobile station: class B Compliant to GSM phase: 2/2+ 4 - Class (2 W @850/ 900 MHz) Class 1 (1 W @ 1800/1900MHz) Dimensions: 24*24*3mm Weight: 3.4g Control via AT commands (GSM 7.07, 7.05 and SIMCOM enhanced AT Commands) SIM application toolkit Supply voltage range: 4.8V 3.1... Low power consumption: 1.5mA (sleep mode) Operation temperature: -40 C to +85 ° C ° FEATURES Fully compatible with for Arduino UNO and Mega2560 development board series Serial port communication, freedom choose hardware serial port (D0/D1) or software serial port (D2/D3) and the motherboard communication mode SIM900, all IO all set aside, not only the UART port, DEBUG port, GPIO port and KEY all, PANEL interface Onboard super capacitor, ensure that RTC work At the same time supporting the hardware switch machine, supporting the hardware reset 4 frequency bandwidth, 850/ 900/ 1800/ 1900 MHz Brand No Brand SKU OT776EL0ZVKZONAFAMZ-156711 Model SIM900