... strict quality controlling system, we also offer electronic products design, PCB design and manufacture, software design and product processing service. We ... Our strength:1, familiar with MCU, ARM system development process 2, profound knowledge of EMS, which helps to design a qualified ... of GSM/GPRS/CDMA/GPS and short distance wireless communication(2.4g, 433/315mhz)7, familiar with RS485/232,DMX512, ...