... minutes, 10 minutes and 15 minutes. 7. With super large LCD video screen with blue color, every time you press the ... key, blue color displaying on LCD video screen for 15 seconds.Product Functions: 1. Head and ... , writers, office staff and etc who often use computers and watch TV suffering headache and near-sightednessApproval : CE, RoHSFOB: Shenzhen , Chinactn ...