To set up your new car accessory, start by securely attaching the holder to the headrest of the front seat. Make sure it is firmly in place to avoid any movement while driving. Next, adjust the arms of the holder to fit the size of your device, whether it's a smartphone or a tablet. The arms are designed to be flexible and can be extended or retracted to accommodate various device sizes. Once the holder is attached and the arms are adjusted, your device is ready for use. This setup allows in the back seat to enjoy viewing of their favorite content, making long car rides more enjoyable and convenient. The sleek design of the holder complements any car interior, adding both functionality and style. Features -Color:Black -Material:Plastic -Size:15.00X14.00X5.00cm/5.89X5.50X1.97in -Universal compatibility: designed to fit a wide range of phone and tablet sizes, making it a versatile accessory for any car -Passenger friendly: the adjustable backseat holder makes it easy for to use their devices comfortably while traveling -Secure and stable: ensures your device remains stable and secure, preventing it from falling or shaking during the drive -Easy setup: quick and easy installation without the need for any tools, allowing you to set it up in minutes -Flexible viewing angles: offers multiple viewing angles to provide the possible viewing experience for all Package list: 4 phone holder