此可视门铃方案正在量产，是用通用单片机2051控制室内外呼叫、对讲、监视、录像、拍照于一体的可视对讲门铃。软硬件一应俱全让你轻松制作投产。-This program is visual doorbell volume production, is the 2051 single-chip general-purpose room and outside calls, intercom, surveillance, video, video camera in one doorbell intercom. Hardware and software allows you to easily create self-production.