Seadream 3D Movie Amplifier 3X Zoom Enlarged Screen Glass Magnifier with Speaker Bracket Folding Portable Stand Holder (white) The screen size: About 7.5 inch HD amplification without power supply, save cost and power, a great environmental products Use HD amplification optical technology,no power-driven, no-cost, energy-saving and environmental protection. Simple, compact, and suitable for all kinds of mobile phone. Reduce the eyes fatigue when you watch videos on the phone. Folding design, small volume, convenient carrying on business travel. The item simple, elegant, light weight, small size and easy to carry, suitable for use in various occasions -- indoor, camping, journey, leisure etc.