We are offering spectrophotometer.- rotary 8 - cell holder with 1 push button to open cell holder cover. - 3 rs - 232 ports & 4 usb port hub to connect to peripheral devices. - 2 years or 2500 hrs worranty on d2 lamp. - 7th color lcd touch screen. - voice guide. - compact size & emotional design. - online upgrade & diagnosis. - built in software optizen view ce. - built in 2 gb memory for data starage (option : 8 gb)