... D1, HD1 and CIF recording resolutionADPCM audio compressionSupport triplex operation: record, playback, net transmissionSupport to operate with USB mouseSupport to backup ... )Playback ModeNormal play, fast forward, fast rewind, frame by frameBackupBackup Record file via USB flash disk, USB disk, USB CD/DVD ... to +40°CWorking Humidity10% to 90% Professional LCD/DVR ,Standalone digital video recorder dvr