TomTom GO 550. Form factor: Fixed. Display diagonal: 109.2 mm (4.3 "), Display resolution: 480 x 272 pixels, Display number of colours: 0.064000 M. Weight: 0.224 kg, Width: 127 mm, Depth: 85 mm. Battery technology: Lithium Polymer (LiPo), Battery life (max): 3 h. Storage capacity: 4096 MB