... working environment-1065* Humidity of working environment: 40%95%* Record your voice to the chime, when Human body close, door ... , human body sensor chime, promotion chime Advantages* Microphone record or Line-in record, * Record your voice to the chime,when Human body close ... ,door chime, it will play.Record door chime,human body sensor chime Applicationsbell alarm,alarm system ...