Screen Magnifier With Bluetooth Speaker ]- HD acrylic lens screen with stereo sound magnifies your phone screen 2-4 times to avoid visual fatigue. It uses  HD acrylic fresnel lens material, anti UV radiation protection. Just mount the phone on to the screen magnifier and start enjoying home theater-like effect. When you connect to bluetooth you can use your phone to watch movie videos. You can also use it to answer your phone calls, just press the hands-free button to answer. It has two charging options; you can use the USB cable to charge directly or use the rechargeable *18650 rechargeable battery. You can also recharge you phone using the USB port at the back of the speaker because the battery when charged acts as a mini power bank. This mobile phone screen enlarger adopt HD zoom optical technology. It is compatible with all smart phones .