1.Please not use this monocular to look the sun straightly, otherwise it will be harm to your eyes.
2.Please put it in a dry place if it is long term unused.
3.Please store your monocular in a dry area even if it is waterproof. It can resist light water but can not be used in a heavy rain for a long time or soaked in the water.
4.Please wipe the lens with dry and clean cloth. If there are some stubborn stains, please use the cloth dipped some alcohol. It would be easy to remove.