EC21 Product Catalogs - firmware rockchip mp4 http://www.ec21.com/ec-market/firmware rockchip mp4.html 4.3-inch Touchscreen MP4 Playerhttp://leanneliu.en.ec21.com/4.3_inch_Touchscreen_MP4_Player--3818139_3818145.htmlFirmware upgradeable USB 2.0 high speed data transmission Built-in 1,800mAh Li-ion battery 30 hours music playbac20090914 MP4 Player WMP-408http://wwii.en.ec21.com/MP4_Player_WMP_408--2479835_2481207.htmlItem Number: WMP-408 Item Name: MP4 Main Features: ROCKCHIP 2606A solution 2.0 inch TFT display 262K colors MP3,WMA,ASF20071126