Features: 1) Delete single / all 2) Page up / page down 3) Supports format: BMP, GIF, JPG, TIF 4) Memory device: 256KB flash 5) Display type: 1.1' CSTN (96 x 64 dots, 4,096 color) 7) Power on / off: magnetism switch 8) Lithium batterries power: the batteries will be charged when it's connecting with USB cable and push the power switch to "on" (about 3hrs) 9) Application: photo viewer 10) Working voltage Li battery: 3.7V / USB 5V 11) Working temperature: 0 - 40癈 12) Transmission interface: USB1.1 13) Operating system: Win98 SE / ME / 2000 / XP 14) Dimensions: 5 x 4.55 x 1.8cm Outer packing: Color box N.W.: 7.58kg G.W.: 8.58kg