ITEM NO:TW608 2.4 Ghz ISM (Intelligent Sensing Motion) Spectrum Direct Sequence Spread Spectrum Technology according with FCC requirements LCD Control Center linking up with 8 accessory cameras Easy Operation Menu setting for user Door Bell with integrated camera and motion sensor Ensure security by taking a picture of anyone who presses the doorbell or if it senses movement in front of the door Cameras can take pictures when they sense movement or simply display real time images on the control center View with real image from 8 different accessory cameras Display pictures taken by the system and save into the flash memory for PC owner to preview