BUY THIS GEOCELL FLIP COVER ALONG WITH 3D SCREEN ENLARGER WITH INBUILT SPEAKER AND POWERBANK.Angle-Adjustable Eyeshield 3D Enlarged Screen Mobile Phone Video Frequency Amplifier with Speaker and 2200 mah Power Bank Facility About the Product 1. Brand new and good quality. 2. With this item, your mobile phone screen can be magnified 3 times, keep picture clear and vivid, dynamic feeling will be stronger! 3. Suitable for all kinds of mobile phones and all various occasions -- indoor, camping, journey, leisure etc. 4. Adopting HD amplification optical technology,no power-driven, no-cost, energy-saving and environmental protection. 5. Reduce the eyes fatigue when you watch videos on the phone. 6. Folding and angle-adjustable design, small volume, convenient for carrying with on your business travel, holiday journey and so on. In order to achieve the best view and optimal amplification effect and the best definition, you can adjust the distance from mobile phone frame to the lens and angle, adjust focal length, lens angle. The best watch angle is vertical to the lens, a distance of 0.5 meters it the best watch distance. Screen Size 7.5 inches Input voltage DC5v Output Voltage DC5v Output current 1A Battery Voltage/Capacity 3.7v/1200-2200 mah Weight 206 g.