TM608 Wireless Digital Survellance System LCD Control Center -Link up with 8accessory cameras -View with real image from 8 different accessory cameras -displays pictures taken by the system and save into the flash memory for home owner to preview -Intercom feature with Door Bell unit or Accessory camera with intercom feature -USB link up with your personal computer to preview or save image on your PC Menu setting easy operation for user Door Bell with integrated camera and motion sensor Unit replaces existing doorbells on homes and uses the existing wires from the old doorbell or if it senses movement in front of the door Accessory Camera -camera can take pictures when they sense movement or simply display real time images on the control center