Product Features: Weight: 5.5 oz.; Installed Memory: 16 MB; Family Line: Casio Pocket Viewer; Type: PDA; Input Method: Touch Screen, Without Handwrite Recognition; Interface Type: USB; Screen Resolution: 160 x 160; Audio Output: Without Build in Speaker; Built-in Music Player: Without MP3 Player; Voice Recorder: Without Voice Recorder; Built-in Digital Camera: Without Digital Camera; Battery Life: Up to 120 Hours; Battery Type: 2 x AAA Batteries; Depth: 0.5 in.; Height: 5.13 in.; Width: 3.25 in.