1.pop up type manual control; 2.screen brand: Samsung; 3.Angle can ... desk. It is designed according to diverse requirements of users, it can be placed on various kinds of meeting ... 19'', 21'', other size can be customized. Function:1. Manual control, Flexibility, stability, waterproof and dust proof;2. The ... from 0-90 degrees;3. Press panel type, manual control;4. Very easy operation for any user to ...