... the card. Book style design. Specification:1. LCD screens: 1.8″, 2.4″, 3.5″, 4.3″, 5″, 7″2. Auto start and loop.3. Build ... -in Li-battery for 2.5hrs-8hrs ... working time4. Memory: 128 MB, 256 MB, 512 MB, 1 GB, 2 GB, 4 GB5. Video formart: FLV, AVI, 3GP, ... our current design. digital greeting card support LCD screens 1.8 inch to 7 inch