Calculator camera dvr 300K pixels Photograph Dimension:352*288 1GB/2GB/4GB/8GB (optional) Vedio Recording Function Calculator camera dvr,calculator DVR, mini dvr calculator,mini hidden dvr, . Function summary - 300K pixels - Vedio Format: AVI - Photograph Dimension: 352*288 - Memory: 1GB/2GB/4GB/8GB (optional) - Vedio Recording Function.- USB: 2.0(Hs)- Built-in Li-battery, working 2 hours ...