Digital Vacuum Regulator exceeds clinical expectations in medical suction procedures by offering technology breakthroughs plus the quality and simplicity you are accustomed to receiving from the analog devices. It provides a reliable, means of setting the regulator for proper continuous suctioning for tracheal and pharyngeal airway management, surgical procedures or emergency resuscitation procedures. It eliminates moving parts, extending the life of the vacuum regulator. It is powered by 4pcs of AAA alkaline battery, allowing it for continuous run up to 500 hours. Features/Benefits Few mechanical parts eliminates moving parts, extending the life of the vacuum regulator Battery power saving design, non-battery waste when it is on OFF mode Precise color coding LED bar represent Low, Medium, High and Full ranges enable medical caregiver to monitor pressure easily Battery power bar alarm display allows easy understanding of battery power condition 8 power bars shall exhausted (1hr/ bar) only when battery power is less than 2.5 Volts that help users to avoid any immediate operation power shut down without any earlier warning. Battery off alarm should exist until all bars diminish. No calibration required Made up of easy-to-replace modular components reduce service part inventory, simplify service procedures and lower cost replacement parts and kits