Servo Control Mode: air temp; ? Instant Parameter Displaying: set temp, air temp and heat power rate; ? Audible & Visual Alarms: power failure, sensor failure, higher & lower temp, air temp override,fan failure,system failure; ? >37? Preset Mode: power failure reset memory, alarm silence, keypad lock, self-test function; ? Hood with dual slope: 6 hand-ports; left & right cabinets, top-shelf; ? RS-232 Output Connector (Use for network system ).