Features: brand new and high quality Universal smartphone adapter easily connects your any mobile phone to a wide variety of optical. Easy to capature. Get your mobile phone into video camera and for image capturer in distant and tiny world. Mobile phone interface is a fixed bracket of microscope & telescope connected to mobile phone. This interface can be fixed mobile phone easy to the microscope (telescope) eyepiece, so that to watch and take pictures. This kit fits most telescppe/binocular/monocular/microscope/riflescope only if dia covers 26.4mm to 46.4mm and applicable to smartphone which width is between 55-98mm. Large diameter locking knob is easy and comfortable to lock the eyepiece. Soft material to protect your phone from three directions and screw locks mobile phone firmly and stably. The clip size can be adjusted to adapt to different types of telescopes. Smartphone capturer can be used in many optical devices, such as Spottingscope, Astronomical Telescope, Binocular, Monocular, Some Riflescope and Nightvision Device and so on. Instruction: Step 1. Loose the knob in the picture. Step 2. Set the mobile phone and tighten the knob to couple your mobile phone with smartphone capturer. Step 3. Adjust the hole to the center of lens. Step 4. Tighten the knob in a secure situation. Step 5. Screw the cap, clamp yout optical instrument in a safe condition. Specification: Material: Plastic Suitable for: Width 55-98mm(2.17-3.86in) mobile phone Eyepiece diameter: 26.4-46.4mm(1.04-1.83in) Color: Black Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Smartphone Adapter 1 x User Manual