Heigh	159 mm without mouthpiece 177 mm with mouthpiece
Width	72 mm
Depth	72 mm
Mouthpiece	21 mm diameter
Volume flask	119ml
Weight	350g
LCD screen	64 x 96 pixels
Heat loss:	Less than or equal to 0.04°C per minute
Battery life	22 days with average use
Typical Response Time	3–4 minutes to complete one measurement cycle
Data transfer	USB 2.0 compliant port
System Requirements	Windows XP or later Pentium 4 or equivalent 1Gb of RAM 1024 x 768 display resolution

The single use, all-in-one, filter mouthpiece is an alternative to the reusable mouthpieces supplied with the X-halo.

Plastic body	Polystyrene, anti-shock, ultrasonically sealed
Filter media	3M filtrate type G-100 gr./m2, electrostatic fibre
Viral filtration efficiency*	99.98%
Bacterial filtration efficiency*	99.99%
Resistance*	0.5 cmH2O/L/s at 720 L/min
Deadspace	28 ml
Package	100 pieces per box

The bottom half of the X-halo is the removal environmental chamber which insulates the temperature sensor from the ambient environment and acts as a reservoir for the exhaled breath. Busy clinics may consider extra chambers to use with the X-halo.