Osaki OS-4000 Zero Gravity Massage Chair

If any expert can tell you one thing,then it ought to be that Osaki OS-4000 Zero Gravity is the best massage chair you can get for your money.It is a mid range massage chair having 6 completely different pre set programs having 2 stage Zero-Gravity positioning inspired by NASA (yep,NASA).It also provides massage by targeting pressure points at hips ,arms,calves,Foots and shoulders.It has 5 speed levels for more intense relaxation.You can have massage in periods of 5 to 30 min.

Full specification of  Osaki OS-4000 Zero Gravity Executive Fully Body Massage Chair are as follows:

Product Name : Osaki OS -4000.

Model No. : OS-4000.

Rated Voltage : 110-120V.

Rated Frequency : 50/60 Hz.

Main Body Dimension : 52L x 31W x 34H (inches).

Vertical Side : 38L x 25W x 15H.

Gross Weigh : 255 lbs.

Auto Timer : 5/10/15/20/25/30 minutes.

Length of the wire : Controller wire : 1.2m.

Power Supply Wire : 2.1m.


Next Generation Air Massage Technology

Massage chair technology

The airbag massager is an upgraded and more engineered chair reducing the volume of airbags and valves but at the same time increasing the surface coverage. Less power is consumed and it runs more quietly with the lowering of air pumps and valves, making it possible for an even more tranquil massage experience. The pad utilized to make the air bags have been modified with industrial grade material for durability and is yet soft and pliable to deliver more comfort and consistency.

Automatic body scan

Osaki OS-4000 Zero Gravity

Osaki OS-4000 comes with the latest technology, which allows rollers to map the back curvature accurately which translates into a more precise massage hitting all the key areas. Regardless of your body type, this highly advanced massage chair will adjust itself for utmost relaxation.Just sit and relax!!!

2 Stage Zero Gravity

zero gravity chair


This feature is inspired by NASA technology allowing you to position yourself at best posture aligning your back relative to your legs.This allows all your complete back weight to be supported by the backrest reducing the vertical stress on the spine.This also gives better circulation of blood.

True Ergonomic S-Track

back problem solved

This massage chair is designed ergonomically so that it fits each and every persons spine shapes.

Using the advanced technology Osaki OS-4000 is able to roll over back in S pattern from the neck down to the lower spine with a consistent pressure.

Wireless Controller

Located on the top right of the main remote, you will find a compact wireless remote allowing you to control the main features of the chair without having to struggle to reach the main remote in the reclined position.

Lower Back Heat Therapy

Many episodes of lower back muscle strain result from strains and over-exertions, creating tension in the muscles and soft tissues around the lower spine. As a result, this restricts proper circulation and sends pain signals to the brain.Muscle spasm in the lower back can create sensations that may range from mild discomfort to excruciating lower back pain. Heat therapy can help relieve pain from the muscle spasm and related tightness in the lower back.

Osaki OS-4000 has 2 heating pads, one on each side in the lower lumbar area.


The outer shoulder measure 20 inches side to side. This translates to a 46” jacket size for men or 22 inches in shoulder width. Anyone who has shoulder wider than 22 inches will find this chair snug in the shoulder region and therefore are recommended to select the Osaki OS-3D Pro Cyber that provides an additional 1.5 more inches in width.

The seat base has a total width of 17 inches which translates to about a 40 inch waist capacity.

This chair will fit anyone comfortably up to 6’3”.
The results may vary as each individual’s body types are different.
Total space required from front to back when reclined is 6 feet. The width is 3 feet from side to side.
The massage chair massage intensity has been measure at 7-8 in regards to back massage intensity.

8 Pre-Set Programs

Osaki OS-4000

Enjoy form 8 preset programs of massages. Every one of the preset programs are unique, each offering a different focus of massage style and on what do you really want. The intensity of the massage will also vary from program to program.These 8 pre set programs are Healthcare, Relax, Smart, Circulation, Demo, neck & Shoulder, Back, Lumbar and Full Air.

See our experts review on Osaki OS-4000 Zero Gravity Massage Chair:

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