SIM900A Smart Electronics GPRS A6 module Wireless Extension Module GSM GPRS Board Antenna Supper SIM900A GSM A6 modules: size 22.8 * 16.8 * 16.8 mm; working temperature 30 °c to + 80 °c; Working temperature: -30 °c to + 80 °c Chip Working voltage: 3.3 V to 4.2 V. The controlller includes MP1584 Step down module, Read more about SIM900A Smart Electronics GPRS A6 module Wireless Extension Module GSM GPRS Board Antenna Supper SIM900A[…]