... 8CH playback simultaneously 8CH Full D1 H.264 Network Stand Alone DVR: GRT-FDK7808Function Feature:1. Adopts the standard Main profile H.264 compression ... backup, network transmission, mobile phone surveillance4. Support backup with USB Flash Disk, Movable hard disk, DVD writer, Network ... channels playback at the same time9. Support Action with Alarm and pre-alarm recording function10. Support Email ...