DELL S2817Q  28" Ultra HD 4K,   (16:9)  3840 x 2160 , TN, 2ms, 160*/170*,  300cd/m2, 1000:1(typ)/8 mln:1 (DCR), 2xHDMI/MHL, 1xDP, 1xmDP,  3x USB 3.0, Audio line-out,  2x 9W speakers /    VESA (100 mm)  /Cable In BOX:  Power, HDMI, DP cable (DP to mDP), USB 3.0 / Black/War 3Yrs 

DELL 29" U2917W 73.03 cm (28.8”) Widescreen Flat Panel Display (21:9)  (2560 x 1080), IPS,anti-glare with hard coat 3H, 5ms, 178*/178*,  300cd/m2, 1000:1,2xHDMI,2xDP, mDP,USB 3.0

Dell P2415Q 60.47cm (23.8") LED IPS 4K  monitor (3840 x 2160)  /(16:9) AG,  /178°/178°/ 300 cd/m² /1000:1(typ)/2 mln:1 (DCR)/ 6 ms  / 1.07 mln colors |Pixel Pitch: 0.13725 mm/ VESA (100 mm)/Height-adjustable (115mm)/Tilt (-5° to 21°)/ Swivel/1 x mini-DisplayPort; 1 x DisplayPort (in);