1.support wireless GPRS/GSM/RF modem; 2.support positive and negative timing ... file.Detailed development documentVC, VB, Delphi develop package, dynamic library DEMO and source code;Buttons, switches, timing, GSM / GPRS wireless ... *IO(HUB08),4*IO(HUB12)Communication modeRS232Wireless communicationSupport RF/GPRS/GSMTotal pixel32KExtend interfaceTest button ,temperature sensor , timing switchPlayerLED ...