Where should I store Meditech pulse oximeter and when should

Where should I store the product?
It is best to store the product in a cool place with ambient temperatures -10-40°C (14-104°F) and 10%-80% humidity ( It is recommended that the product should be kept in a dry environment at all time. A humid ambient might affect oximeters life span and even might damage the product.
Please follow the law of the local government to deal with used battery.
When should I replace the batteries?
A warning light will appear on screen when batteries should be replaced.