Defender SENTINEL9 Ultra Slim Web Ready 4 Channel 17-Inch LCD DVR Security System with 4 Indoor/Outdoor Hi-Res Night Vision Surveillance Cameras Stylishly Integrated 17-Inch LCD - The LCD profile is amazingly slim. View crisp clean video on the 17-Inch screen. The SENTINEL9 instantly transforms your viewing space into a vibrant, clutter-free security base station. Record Up To 240 Days - This DVR utilizes the advanced Seagate SV35 hard drive. The 160GB hard drive has a 5 year warranty and was designed by Seagate for optimization with DVRs to ensure secure and consistent recording for years. View Video Online with No Service Fees (Supports DDNS) - View live or recorded footage from any computer with Internet Explorer, anywhere in the world (other web browsers are not compatible) Email Alerts - This system helps keep you notified of events occurring happening in your monitoring location. You can set the unit to automatically send alerts to your email inbox whenever motion is detected or when cameras lose power. USB/DVD/CD Backup - You can transfer video footage to a USB flash drive for archiving or offsite viewing. You can also transfer your footage using an external DVD/CD writer.