Compatible Models:Idon sport band compatible for Newest Apple Watch SE, Apple Watch Series 6, Series 5, Watch Series 4, Series 3, Series 2, Series 1. All Models.NOTICE: 38MM/40MM S/M, 38MM/40MM M/L sizes are compatible for watch 38mm/40mm, 42MM/44MM S/M, 42MM/44MM M/L sizes are compatible for watch 42mm/44mm; 38mm/40mm S/M size fits for 130-180mm wrists, 40mm/38mm M/L size fits for 140-190mm wrists. 42mm/44mm S/M size fits for 150-200mm wrists, 44mm/42mm M/L size fits for 160-210mm wrists. S/M means sizeSmall, M/L means sizeLarge! Please choose the correct watch model and size for yourself.How to install/ remove compatible apple watchband:Step 1: Please distinguish the front and back of the wristband: The black point is Front, the silver point is BackStep 2: Align watch band into the slot of the Watch, then push the band inStep 3: Sway both of the bands to make sure that they are attached firmlt and installed successfully.Step 4: Press button with your left hand, hold the wristband with your right band, move up or down * If you want to change other bands, please Press the release button of the back of the watch to slide out.Kindly NOTICE: Please wait a few seconds after you slip it into your Watch, make sure the band won't up and down when it sits in place completely.Premium Material: High-quality soft silicone with smooth finish for a sporty look, comfortable and durable. Won't get dirty easily, and easy to clean.Simple Installation: Two watch lugs on both ends, which locks onto Watch interface precisely and securely. Easy and direct installation and one button removal.