PromotionBcomtech 7 Inch Intercom Door Station with Door Release Door Bell Camera Door Phone Intercom System 1V1 1200TVL HD Night Vision Home House Security Indoor Monitor Features:7 Inch,door answering,call transfer,monitoring and unlock, dual-way intercom,photo/video record, up to 32GB SD card supported(Not Included), Outdoor doorbell camera:1200TVL,CMOS sensor,day/night Vision,adjustable volume,3.6mm lens Support up to 4 Indoor monitor and 2 outdoor camera,2 CCTV camera. The alarm is also compatible. Waterproof level:IP65 There is an about 5 meter extension cable included in the package.