Transmission rate: Red >650 Kbps , Write >600 KbpsUSB interface:USB 2.0Power SupplyBuilt-in 1050mAh lithium cellComntinuous play for 4 hours could be realized after the battery is fullycharged or about 6 hours in the screen saver mode(for reference only)Memory: 128M/256M/512M/1GB/2GBSound reording Format: MP3 MP3& WMA: duration: 36 hours(128M)Compression rate : 32Kbps --384KbpsFrequency response: 20Hz --20KHzDistortion : 85dB Signal separation degree : >80dBStandard audio output : About 5mW +5mW(32 ohm)CMOS:Resolution :1.3M Frame number and imaging speed : 30 fpsNumber color bits : 24-bit Focusing mode/scope:4 x Zoom/0.6m --infinite distance,10 grades(adjustable) ,Five modes(custormizable)Video format: 3GP,ASF,MP4,AVI