The HD Micro Compressor XP-321 Set includes an air compressor and airbrush gun. The HD Micro Compressor XP-321 Set was especially designed to apply the Kryolan professional beauty make-up products High Definition Micro Foundation On Air. This system operates with a gentle air-flow pressure of only 2.1 bar (appr. 30 psi). It is also exceptionally quiet in operation. For mobile work, the HD Micro Compressor XP-321 can also be powered with the rechargeable battery pack that is also supplied. Other airbrush guns can also be connected to the HD Micro Compressor XP-321. This set includes the compressor, airbrush gun, battery pack and bag.