This finger strap stick-on holder Help thumb reaches more area without shifting grip. Enables easier one-handed texting, photos, selfies, and holding your phone or tablet. Compatible: Versatile, Supports Most Mobile Devices which have a flat back. The iPhone12/12pro iPhone11/11pro/X/Xs/Xs Max/XR/8/8plus and 7/7plus color black models has an anti-fingerprint coating on the back of these devices that dont allow adhesive so we recommend a case with these phone models. NOTE: Doesnt work with surfaces unevenmattearc-shapedanti-fingerprint coatingwaterproof coating devices.To increase the viscosity of the adhesive. Please press hard and use it after 6-10 hours when you sticking the finger strap holder to the back of the phone. On-screen images of finishes and colors may vary from actual product due to variations in monitor and image capture settings. SIZE:2.6in*1.4in How to use: 1. Clean the back of your mobile device. 2. Remove the film of the adhesive. 3. Place the finger strap on the back of your mobile device. 13. If you dont want use, it could be removed cleanly from your cell phone back easily. - THIN AND PRACTICAL: This phone ring holder allows for easy one-handed or even no-handed grip, perfect for texting, selfies, and photos. Its ergonomic design and removable reusable adhesive ensure a residue-free attachment to your device. - Compatible with most phones: these finger grip straps are compatible with 4 - 8 inch smartphones, tablets and other similar digital devices; They are easy and quick to install, convenient for you to hold your phone securely and stably. - EASY AND CONVENIENT: Great for taking crisp, one-handed photos and videos, this phone grip can be flipped to the back of your hand to make room when you need it, and is a convenient way to hold your device while jogging or cycling. - Slim pocket-friendly design Soft comfortable elastic grip Safe no-residue removable reusable adhesive, See directions below on how to setup the WUOJI Phone grip,Assistant adhesive film.allows Grips to work perfectlys with glass back phones. - Reminder Effectively use the best stickiness of the finger strap phone holder, please watch the video introduction of the product using the ring patiently.For Smartphones that are waterproof or have anti-fingerprint properties:such as iPhone 15/14/13/12/11/X/X Max/XR/8/8 series , an assistant adhesive film is provided. This film helps the grip adhere perfectly to the glass back. - Package includesUS and international utility and design patents have been filed.The Package includes WUOJI Grip 2pc, Assistant Adhesive Film 2pc, Manual 1pc. All WUOJI products have 90 Days Warranty!