Weight:0.5 kg Screen Color:Red+Black+White Case Color:White Resolution:880 *528 Active Area:163.24 *97 .94 (mm) Pixel Pitch:0.1855*0.1855 (mm) DPI:137 Viewing Angle:180' Contrast Ratio:10 Panel's Life:5 Years or 1,000,000 Times Working Temperature:0 ~ 30'C Battery?4000mAh Built-in Rechargeable Polymer Battery Life:1 Year Standby + 10,000 Screen Refreshes Case Material:PC & ABS Wireless Communication:802 .15.4 Communication Distance:100m (Free-space with line-of-sight) Charge:Micro USB Plugin Upgrade:OTA or Debug Port Language Support:Multilingual