Features & Compatibility The DE-3100 dermatoscope is able to attach on smartphone and camera with the help of a magnetic ring. M17 magnetic ring is for smartphone, which should work together with a universal lens mount or phone cover adapter. M49 magnetic ring is for camera which has built in 49mm filter interface. Note: Set Pricing is variable and will update depending on the products you select. * (M17) Magnetic Ring Screw Size: M17*1.0mm * (M49) Magnetic Ring Screw Size: M49*1.0mm * Material: Aluminum & Magnet * Works with IBOOLO dermatoscopes Easy to Use for Camera The magnetic ring adapter helps you attach your dermatoscope to a camera which has built in 49mm filter interface. Easy to Use for Phone The phone adapter gives the ability to attach your dermatoscope to a smartphone and take pictures in 5 seconds.