Are you looking for a car holder that will serve you reliably while you are driving in your car? With the ACEFAST Air vent you won't make a mistake. It attaches to the car's ventilation grille, so you don't have to worry about the holder not fitting in your car. If you own a 4.7 to 6.8-inch mobile phone, compatibility with the ACEFAST Air vent electric car holder is assured. Your phone is attached with an automatic clamp and the holder itself is locked firmly to the air vent. The ACEFAST mobile phone holder is recharged with the included USB-C cable. When the carengine is not running, it runs on its own 250mAh battery.