Cách sử dụng
A spyglass is a small telescope that is used to see objects that are far away, like ships or birds. It is also called a binoculars or a monocular. People often use a spyglass for outdoor activities like birdwatching, boating, or hiking. It is a helpful tool for seeing small details that are too far away to be seen with the naked eye. So, if you need to see something far away and closely, a spyglass can be a useful tool for you.