The VT-Plus HF has the capability to measure bidirectional high or low flow & pressure + low and high pressure in 3 separate channels with on-board numeric or graphics. Key Features: Bi-directional flow, pressure, volume, and oxygen concentration, and pressure measurements. Low- and high-pressure, and flow measurement capability . Special HF mode—up to 900 BPM (15 Hz). VT for Windows PC software. All 21ventilator parameters displayed at once on one screen. Operation by VT PLUS HF commands or special RT-200 command. Minimum, maximum, average, absolute, and graph for all parameters. Multiple special-function tests for efficient troubleshooting. Optional Ansur plug-in software for complete maintenance automation.