Three groups. The upper trapezius across the top of the shoulder and into the neck, the suboccipitals at the base of the skull, and the pectoralis minor on the chest wall under the front of the shoulder. Each one has its own body position, and the first two work from the floor while the third works against a wall.

Distance from your spine. The narrow pair reaches the muscles closest to the spine, the medium pair the muscles in between, and the wide pair the muscles furthest from it. Taken together, the three pairs of tips span 1.63 in. to 3.06 in. Nothing else on the tool changes, so the pair you pick is the whole setting.

Lie on your back with your knees bent and your feet flat, and set the tips on the top of the shoulder where the trapezius runs into the neck. Push through your feet to move your body toward the tips and add as much pressure as you want. Hold 90 seconds while you breathe deeply, then move the tool along and take the next spot.

Lie on your back with your knees bent and rest your head over the tips, with the tool just under the ridge at the bottom of the skull where the suboccipitals sit. The weight of your head is the only pressure involved, so there is nothing to push against. Hold 90 seconds, then switch tip width or move the tool slightly and go again.

Stand and hold the Range against a wall with the tips facing you, then lean your chest in until the tips sit under the front of the shoulder where the pectoralis minor lies. Leaning further in adds pressure and standing back takes it away, all without leaving the position. Hold 90 seconds, then move or change the pair of tips.

90 seconds in each position, held still and breathing deeply, then relocate or change the tip width and repeat. Keep the pressure moderate enough that you can stay settled and keep breathing slowly. Aletha's guidance across its tools is one to three spots per day on each side of the body.

5.06 in. long, 3.94 in. high and 9 oz, and the three pairs of tips span 1.63 in. to 3.06 in. The build is a polycarbonate and ABS blend with a thermoplastic elastomer surface, and Aletha builds it in the USA in black and white.

Anyone under the age of 18, and anyone the caution list rules out. Do not use the Range if you have vertebral artery insufficiency, an aneurysm, vascular disease or an increased risk of lymphedema. If you have a pre-existing condition of any kind, consult your doctor before you use it at all. Serious or fatal injury can occur where an Aletha product is used incorrectly.

Yes. The Range and the Mark are the only two Aletha tools that sit inside Aletha's 60 day return window, which runs from the delivery date and asks for the item like-new with its original packaging. Neither the Orbit nor the Band qualifies. Returns on your order with us are handled under our own terms.

365 days from the date of purchase, against defects in materials and workmanship, for the original purchaser. Aletha decides between a fix and a swap. Cosmetic marks, misuse, an accident, contact with liquid, ordinary wear and any modification made outside Aletha all fall outside the cover.

Different half of the body and a different mechanism. The Range works above the waist with three fixed tip widths and no moving parts. The Mark works at the front of the hip and carries a rotating joint that changes the angle of one tip. Both hold for 90 seconds, and both sit inside Aletha's 60 day return window. The Full Body System carries both in one box.