The bt diverse 7450 trio plus ndash a high class dect cordless telephone for outstanding performancebt have been making cordless phones for the uk market for many years and with the bt diverse 7450 plus they have brought us one of the best featuring a sleek black handset with a large high quality lcd monochrome screen this phone strikes the perfect balance between style and functionality with an in built answering machine for up to 27 minutes recording time a sim card reader