Video-Tech Electronics, a professional supplier of video intercom system, featured products with high quality, bring an effective solution to your security needs. Thanks to distributors from more than 60 countries, Video-Tech has been becoming a reliable OEM partner for them, and our qualified products are winning more and more respects from market, we are eager to growing up together with our customers. -------------------------------------------------------------------------------------------------------------------------------------Product portfolio 2EASY------DT 2 wire non polarity vido intercom system for villa andapartment ------------------------------------------------------------------------------------------------------------------------------------- 2Wire non-polarity system introduction: 2 Wire bus system Bigger capacity(Max.6368 users) Central power supply Network communication Villa & Apartment application IP base for complex residence Mobile phone call transfer Compatibility All devices are compatible with each other Support other security & peripheral products Flexibility Bus wiring via daisy chain/star topology Varied cables adaption Reliability FM&ASK technology