Lenovo ThinkPad T490 User Manual page 100

Glass parts notice
CAUTION:
Some parts of your product may be made of glass. This glass could break if the product is dropped on
a hard surface or receives a substantial impact. If glass breaks, do not touch or attempt to remove it.
Stop using your product until the glass is replaced by trained service personnel.
Static electricity prevention
Operating environment
Maximum altitude (without pressurization)
Temperature
Note:
Relative humidity
94