... H.264 High Profile Compression,Video Resolution:1280x1024,4 Channels D1 Real-time SD Card Mobile DVR with GPS MAIN FEATURES 1. ... BITRATE660Kbps ~ 1.5Mbps, 4 level video quality1.32Mbps ~ 3Mbps, 4 level video quality1.98Mbps ~ 4.5Mbps, 4 level video quality AUDIOAUDIO ... Ω, RCAAUDIO LEVEL1V ~2V, p-pAUDIO COMPRESSIONG.711 STORAGESTORAGESD card, external USB device(memory stick or hard drive)FILE FORMATAVI ...