Seems like a good price @ $7.99 looks like there are 2 models at the same price
Details from description:
【One-hand Operation】This gravity car mount for vent grips securely your device automatically via gravity linkage, so it enables you to put in and take out your phone with one hand easily. Free your hands from smartphone or GPS and will not block your sight for safe driving.
【Gravity Linkage Design】The triangle shaped by the three arms will cradle the phone tightly no matter you drive on a rough road or brake suddenly. The clip of car mount is made of quality rubber, which will lock the air vent firmly and more importantly, it will not do any harm to air vent blades.
【Wide Compatibility】The phone holder is compatible with 4.0"-6.5" devices, including iPhone XR/XS/XS Max/X/8/8 Plus/7/7 Plus/6, Samsung Galaxy Note 9/Note 8/S10/S10 Plus/S8 Plus/S9 Plus/S8/S7, LG V30/G6/G5/V20/G7, Mate 20 X/Mate 20 Pro/P30/P30 Pro/P20/P20 Pro/Mate 10 Pro/Mate 9/Honor 10/Honor 8X.
【Adjustable Viewing & Charging Free】360°adjustable swivel ball of the holder allows you to fix your phone to the optimal position for perfect viewing. Easily access control buttons and charging port on the phone via the preseverd port, never worry about power off on your car trip.