Dear:<br /> High Quality，wish you like it!  Description<br />Category: Eye care tools<br />Material: PP+ABS<br />Power Mode: Electric<br />Size:30MM*124MM<br />Power Source: DC<br />Power: 3W<br />Instructions:<br />1.Rotate the battery cover、place into 2AA batteries(Size 5).and pay attention to positive and negative direction.<br />2.Close the battery cover.<br />3.Turn  electrical switches to \\