This simplifies the use of features such as projector stacking, built in blending and warping, and the scheduling capabilities. In addition, these projectors have high security capability such as MAC Address Filtering and SSID Stealth. Vivitek is a brand of Delta Electronics, which also had a booth at ISE and is written up separately ( Videowall Cubes at ISE ). Projectors are sold under the Vivitek brand name and both LED videowalls and rear projection cubes for control rooms are sold under the Delta brand. At ISE 2017, Vivitek launched two new DLP large venue laser-phosphor single panel projectors, the DK8500Z and the DU8190Z. The two projectors are nearly identical except the DK8500Z is a 4K/UHD (3840 x 2160, 16:9, 0.66" DLP) projector with 7,500 ANSI lumens and the DU8190Z is a WUXGA (1920 x 1200, 16:10, 0.67" DLP) with 10,000 ANSI lumens. Both have a laser-phosphor light source with 20,000 hours life and 10,000:1 contrast. They can use the same eight lenses and have motorized zoom, focus and lens shift.