My ClickBD
GSM module: SIM900A ◾ RTC backup battery ◾ power switch ◾ SIM card Slot ◾ SMA antenna interfaces and supporting small antenna ◾ Power On / Off button ◾ Network status indicator (red) ◾ A microphone port ◾ A headphone jack ◾ RS232 interface selection ◾ RS232 serial port ◾ lithium battery Interface ◾ power input connector ◾ power LED (blue) |