Features: 1) Adopting multimedia computer, it can support every education software, and play multimedia teaching materials, such as CD, VCD, DVD, MP3, video disk and TV2) Controlling the four-way input, it can choose one as the output3) It can control and send one VGA signal to projecting apparatus and other output equipment4) The student recorder uses electricity-controlled movement, liquid crystal display, as well as the examination-chosen function5) What's more, teachers can remotely operate the student recorders and cassette lock6) It can simultaneously send the audio frequency and pictures7) It has the function of teaching and free learning8) Perfect standardization test function9) Free test, random test, oral test, A/B-chosen test10) The screen can display the standard answers which are sent by teachers through the main control platform11) Analysis function12) Random monitoring and canning monitoring function13) Individual dialogue and demonstration function14) Meeting function15) Seat edition function 16) Digital record function and teaching material re-record function17) Function of calling the roll, function of respond to calling, function of teacher interposal producing area:China payment:T/T in advance supplying capacity:50 sets/month