Shenzhen Telifeng technology Co., Ltd. specializes in the innovative use of technology to produce electronic educational products. Our "OID talking pens" and "OID teacher's pointers" are the first of their kind in the world to use "invisible" OID code (Optic Identification/Optic Index pen of monomer) technology in their production. Such all-in-one gadgets vocalize written materials when their tips are moved near the text. These two lines of products have already obtained the State ...   |