With the domestic market for health products continuing to expand rapidly, appliance vendors are now marketing a range of home-use oxygen units.

On March 10, electronics giant Matsushita Electric Industrial Co. debuted the MS-X1 Oxygen Concentrator, a compact oxygen-supply unit that looks like a standard phone headset.

The product can boost oxygen levels for the user from the usual 21 percent to about 30 percent, using an oxygen-enrichment membrane, according to Matsushita. Users breathe the oxygen in via a headset tube.