product features:\n\n1. may link 1 set of inflatable garment with 4 air chambers, either two sets of garments with 4 air chambers, or 1 set of garment with 8 air chambers.\n\n2. of small volume and a stable structure, lightweight and portable u.l.\n\n3. led screen displays times and pressures, with a clear and direct view of parameter.\n\n4. easy of use, enable the single key to move.\n\n5. variety of compression hoses and arm sleeves to choose.