Griffin Skyview Travel Seatback Mount for Mobile Devices - Handsfree travel tray mount for mobile devices Adjustable cradle fits most smartphones and compact e-readers and tablet devices, up to 5.25" x 8" (13.3 x 20.3 cm) Width: minimum of 4" and maximum of 5.25" Base fits over seatback latch and grips for a secure, stable mount