Function--- Get mobile phone in video camera, spotting scope, telescope and picture capture of the moon, Jupiter and Mars; explore the nature of the world easily with your screen or enjoy the little world with this phone adapter. Easy to install and useEasy and convenient to install, the built-in camera of the mobile phone fits well with this mobile adapter eyepiece opening, large diameter locking button is easy and convenient to lock the eyepiece; simply turn your phone into a telephoto lens and let the remote moon appear in front of your eyepiece with much detailed surface. Adjustable clamping design and soft protection. The outer side for connecting the phone and eyepiece are covered with soft material. Protect your device from scratches and damage. Gains soft material to protect your phone from three directions and adjustable firm and firm locking of the lock phone firmly, no worry about the smartphone that slides out. Versatile style and wide compatibility: this telescopic holder is compatible with most types of optical devices, binocular, monocular, spotting scope, microscope, scope, scope, whose eyepiece diameter is between 25 mm and 48 mm. Cool little gadget is also a good choice for atrophies High quality and durable--- Mainly made of aluminium. High strength PA plastic. One time purchase for long-term use, very practical and cost-effective smartphone adapter holder.