... volume.* Support downloaded by USB2.0 and fast. * The human body induction system, 120°angle of view,distance is about ... door chime, it will play.* Record door chime, human body sensor chime* Human body sensor chime, door chime, record door chime ... alarm,alarm system, human body sensor, door bell... Speeding alarm , vehicle speeding alarm , overspeed alarm , alarm ,anti-theft alarm ,security ...