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Features:
Mobile phone screen can be magnified 3 times with high definition optics technology.
Curved screen design.
Light weight, easy to carry.
Suitable for indoor, camping, travel, leisure etc.
Suitable for various types of mobile phone.
Fresnel lens.
Makes more sense to wear reading glasses and hold the phone closer. Much brighter and less image degradation.
You could use this as a member enlarger. Equally useful.