SIM900A GSM / GPRS Cellphone Development Board w/ Audio Port / 3-LED Indicators - Deep Blue
900 / 1800MHz GSM / GPRS module; With LM2596 large power chip assuring long-time stable work; Flip-open SIM card slot; Input voltage: 7.5~12V; With audio interface and microphone; With UART port; 3-LED indicators: power signal incoming call.