Screen enlarge magnifier hd video amplifier 3d mobile phone smart phone stand silicone non-slip design to prevent the phone from falling. -no battery, energy saving and environmental protection. -delicate and compact, easy to carry. suitable for indoor, travel, camping and anywhere. -use high-definition optical technology to enlarge 3-5 times on the mobile phone screen, the picture is clear, providing you with the most unique visual enjoyment. -it can filter harmful light sources to provide radiation protection and prevent visual fatigue caused by long-term reading novelty and watching movies and videos. -first choice for birthday gifts for friends and family!