Enjoy the effect of 3 times magnification of mobile phone screen. Add audio amplifier to increase the volume of mobile phone. Suitable for 3.5mm headphone jack phone Safe and environmentally friendly material, and the built-in battery can be recharged repeatedly. Simplified appearance, easy to carry, and suitable for apple and most Android smart phones. It can be a gift and more suitable for the elderly watching movies and news. Tips: The pictures and videos displayed on this product are for reference only (only for advertisement). It will be different from the actual use of the product (the actual pictures and videos are not as clear as the videos and pictures in the advertisement). If you mind, please think before buying!