... degree angleAudioFull record--38dB high-fidelity sound recording CharacteristicFunctionReal-time video surveillance loop / motion detection monitoring (two modes)HD camera300 000 ... /ME/2000/XP/vista/win7 other systemsScopeOccasionFamilies, businesses, supermarkets, warehouses, meeting records, monitoring records, evidence records, driving records, applications, offices, schools ...