... TFT color LCD display,Aluminum case; Flat screen touch, Video calling, talking conversation & intercom w/ inside extension door phones ... is 8,000 copies ZAD525-1CX Functions: *Tempered glass faceplate, fashion and beautiful design,*Flush mount or surface mount ... , true, and vividly transfers and records the visitor info.*Video calling, conversation with extension phones, guard masters, condominium, ...