Apalert Respiratory Monitor. The Apalert makes care of veterinary patients much easier by signaling each breath, measuring the time between breaths and by alarming if breathing stops, slows or becomes shallower. Audible & visual respiratory beep. Digital display of time between breaths. No-breath alarm adjustment 10-60 secs. Rechargeable battery (70 hours per charge) with low battery alarm. Replacement accessories also available separately. This is a complete set.