Cutequeen 2 in 1: Adapter and CAR Boat Truck VAN Recessed Cup Drink Holder Cell Phone it is no installation needed. Only put into standard cup holder. The adapter can makes any size mug, cup, or bottle fit in your vehicle's standard cup holder Dimensions: diameter 3.5" top of cup, diameter 2.5" bottom of cup. it can hold your cell phone CuteQueen trading Brand is known worldwide with superior product quality and service