we are the leading manufacturer of B/W CRT module (?0mm and
?3mm), 4 Inch Direct Thermal Flat CRT tube, DHC electron gun, LCD modules etc,which are perfect for video door phone. We know that you produce video door phone and think our CRT and LCD modules can help your business. Kindly note that we have our own R&D and production lines with about 3000 square meter factory and our CRT modules completely use Sony's technology since our mother company JAPAN TOSHO TRADING COMPANY successfully purchased Sony's CRT license in 2004. Tosho inherits and upgrades Sony's technology, management and strict quality demand.  As a Glod Supplier in Alibaba, we make sure to supply our best products with most competitive price for our customer.