1. Premium Quality - Designed with advanced optical lenses that capture photos and videos with amazing sharpness and detail. 2. Bi-Split Screen Lens Mirror Video Effect - Participants will be able to see the full panoramic view of the piano keyboard while the teacher hands are together the participant could still see the individual fingers on the note up close through mirror video not appear reversed to the students. The student/participant sees it the way it is intended. 3. Universal Design - The lenses can work on most types of mobile phones which camera lenses are not bigger than 13mm diameter such as for iPhone, iPad, Samsung and other smartphones and even tablets. 4. Wide Hemispherical Image-The wide-angle lens projects a substantially large range no need to stand to see the full key bracket, more high-definition and can greatly expand to 180 Degree view such as group people, building and landscape. 5. that is easy to carry when travelling and hiking. Lens are easy to attach to your phone with a soft rubber clip that won't scratch or damage your mobile device. With improved clip length to make it more stable on your phone. Type:Piano Fish Eye Lens Type:Zoom Lessons Online Lens Type:Selfie Wide-Angle Lens Type:FishEye Lens Type:teaching Lens Colour:black Material:Aluminum + plastic + optical glass Size: Mirror length: 10.8cm Width: 6.8cm Package Contents: 1 x Sparring Lens Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.