SAC16 V3.07.6 NOTICE: 1.This version is only for version of V3.XX. (Please check your version with \"INFO\" button in DVR) 2.It spends 5 to 20 minutes to upgrade for the version of V3.07.6 3.During upgrade process, if taking place power lose or user doesn\'t wait the information \"PLEASE SYSTEM REBOOT\" of appearing at cutting off power by oneself promptly, may cause DVR unable to start the machine normally and must send DVR back to the maintenance in the factory. Procedures: 1.Copy the unzipped firmware folder to USB stick. 2.Insert USB stick in USB port of SAC16, Power on SAC16 and enter Main Menu, SETUP MODE -> SYSTEM SET -> FIRMWARE UPDATE -> UPDATE START. Re-boot DVR when initialized warning.