... out of style 3. Flexible Display mode Vstar digital video recorder surveillance 1. Flexible Display mode: Full Screen, Quad, ... interface; support user-friendly GUI, simple operation8. Sophisticated Network Functions: remote surveillance, remote playback, remote recording, remote menu setup, ... -user online monitoring simultaneously (10 user)11. Backup: network, USB2.0, CD/DVD-RW12. Support PTZ preset ...