CHF679.–
Dell UltraSharp U2723QE
3840 x 2160 Pixels, 27"
Question about Dell UltraSharp U2723QE
Can I connect this to an iMac as a second screen?
It depends on the age and model of the iMac, but pretty sure yes. I connected a 2014 iMac with a mini DisplayPort-to-DisplayPort cable; newer iMacs are almost guaranteed (with an adapter at best) to all connect as well.