Specification:Size: 73 x 26 x 12mmUSB interface: USB 2.0 High SpeedTF card: USB 2.0 High SpeedBattery capacity: 3.7V/500 mAH lithium batteryRecording format: WAV 512KbpsRecording video format: AVI 1920 x 1080P 1280 x 720P 640 x 480PVideo encoding: MJPGImage ratio: 4:38GBTF card storage time: about ..