Abstract: The invention is an improved air test means in kit form that is portable and, additionally, includes a complete system arrangement for a plurality of modes of use. The portable kit is self contained for compressing air with a built-in power supply means. The system includes a high pressure test means, and a facility for storage of auxiliary equipment. The system, in addition to the built-in power supply means, has provisions for convenient operation from an external power supply means of comparable voltage output or for support power to preserve the built-in power supply means. Means are provided for convenient recharging of the built-in power supply means and for the attachment and use of auxiliary equipment such as a portable light means. The kit housing is provided with a safety vent for the power supply means and an automatic shut-off means if the kit is closed without first stopping the operating mechanism.