Fangrui Product Details 1. L8 8.5 Inch Mobile Phone Screen Amplifier Bluetooth Subwoofer Speaker Phone Amplifier 2. Material: Acrylic Lens + Abs Shell 3. Applicable Mobile Phones: Mobile Phones With Screens Within 6 Inches 4. Net Weight: 105 Grams 5. Size: 18.5x16.5x2 Cm 6. Speaker: 4 Ohms 3 Watts With Diaphragm Sound 7. High-definition Screen Amplifier With Bluetooth Audio, The Lens Adopts Fresnel Optics And Acrylic High-definition Lens, So That The Viewing Effect Of The Screen Is Realistic And Three-dimensional. 8. A Bluetooth Speaker With Diaphragm Is Added, Which Solves The Problem Of Low Mobile Phone Sound. Whether You Are Watching Tv Or Listening To Music, You Can Experience The High And Low Sounds Of The Theater Diaphragm Sound At Any Time. 9. The Light Barrier Function Is Specially Designed To Solve The Visual Fatigue Caused By Light Reflection When Watching A Drama. The Light Barrier Can Be Adjusted In Height. At The Same Time, This Light Barrier Is Also A Screen Protective Cover, So There Is No Need To Worry About The Problem Of Easy Screen Display. You Can Also Post A Photo On The Light Barrier. When Not In Use, It Is A Desktop Photo Frame, Which Does Not Occupy Space And Plays A Decorative Role. 10. The User Can Purchase A Battery (18650 Flat Head) For Installation, Install The Battery, And Then Take It Out Of The House Anytime And Anywhere. It Can Also Be Used As An Mobile Power Source To Charge The Phone 11. Reminder: This Product Does Not Contain 18650 Batteries. If The Battery Is Not Installed, You Can Also Directly Plug In The Android Phone Charger, But The Sound Cannot Be Loud, Otherwise It Will Cause Current Or Intermittent Sound Due To Insufficient Power Supply.