A-Rival NAV-PN35F-WE. Form factor: Fixed. Display diagonal: 88.9 mm (3.5 "), Display resolution: 320 x 240 pixels, Display number of colours: 0.065000 M. Compatible memory cards: microSD. Processor clock speed: 500 MHz, Built-in processor: SiRFatlasIV. Weight: 0.122 kg