Allows use of smart phone touch screen Allows use of smart phone touch screen Offers visual and audio interaction Vibration resistant mount Water resistant design holds tools and parts Phone window size: 2.75` x 4.5` Fits phones 2.75 x 5` (Galaxy S7) or smaller without case Bag size: 6.5` x 3.5` x 3` (Exterior dimensions) - 30 cubic inches The Velotrac iApp features: Navigation map and Trac points Day and night illumination Avg speed / Pace / Total distance Workout history *Cubic inch measurement does not include phone storage area