N7700 two-way SD interactive DTV set-top box ,energy-saving and environment friendly,which ... completely meet DVB-C standard OutlineN7700 two-way SD interactive DTV set-top box ,energy-saving and environment friendly,which ... ,datacasting,advertisement,stock,etcSupport two-way service,such as: VOD,interactive game,unionpay,etcDouble-USB interface,can be connected with external ...