“It has height adjustment, preheating and three types of automatic modes, so I can comfortably receive a massage. The best value for money.”
Gary Pruitt · Tampa, FLVerified purchase
“Beautiful and good, and the materials used in the device make you feel quality and luxury. It arrived quickly and the packaging was very good and secure.”
Rhonda Kessinger · Allentown, PAVerified purchase
“It's easy to use and has an adjustable intensity, which is great. It's great that it can operate in four modes simultaneously: vibration, air, electric and heating.”
Dale Prochaska · Buffalo, NYVerified purchase30-DAY RISK-FREE TRIAL
Try it every night for 30 days. If you're not happy with it, we refund it.
TRACKED SHIPPING
Every order ships with tracking, straight to your door.
BUILT FOR NIGHTLY USE
Rechargeable, slim and easy to store. About 2 hours of use per charge.
Why The Stiffness Keeps Coming Back
Pads, Patches And Pills Work On The Sore Spot. Your Lower Back Works As A System.
Heating pads, patches, pills: each one gives you a few hours. Then the ache is back, a little sharper, a little deeper.
That's what the radiologist meant: “You're treating the symptom, not the system.”
Your lower back isn't one sore spot. It's muscles and joints that hold you up all day, through every hour of sitting, bracing and standing.
Rubbing one spot for a few hours doesn't reach the rest of it.
Work on the system, not just the spot.
The Rena 4D Lumbar Massager Warms, Lifts And Moves Your Whole Lower Back In 10 Minutes
It brings heat, pressure and movement together in one slim massager you lie on.
Here's what happens when you lie down and press Auto:
- Heat: The built-in heat warms the area, like a heating pad, but under your whole lower back.
- Lift: An air chamber slowly raises your lower back up to 2 inches, then lowers it again, in a gentle up-and-down cycle.
- Swing + vibration: The top rocks side to side while vibration massages the muscles that held you up all day.
After 10 minutes: Auto mode stops by itself. Most people make it a nightly habit, right before bed.
The best part? Use it on the floor or any firm, flat surface. In the evening, while you watch TV, before bed. No appointments, no wall cord.
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30-Day Risk-Free Trial
Why It's Different From What You've Tried
The problem with quick fixes:
Heating pad = heat only, on one spot
Patches = the sore spot, for a few hours
Pills = dull the feeling, then it's back
Warms the whole lower back
Gentle pressure lift up to 2 in
Side-to-side swing + vibration
Heat. Pressure. Movement. 10 minutes a night.
The Simpler Nightly Habit
No pills, no appointments, no patches to keep buying.
Rena 4D Lumbar Massager
HEAT, PRESSURE & MOVEMENT
All three at once, under your whole lower back
10 MINUTES A NIGHT
Press Auto: it stops by itself
AT HOME
On the floor, in the evening, before bed
ONE-TIME COST
Buy once, use it every night
RECHARGEABLE
About 2 hours of use per charge
Other Quick Fixes
ONE SPOT ONLY
Pads and patches cover the sore spot, not the rest
WEAR OFF IN HOURS
Then you're reaching for the next one
KEEP COSTING
Patches, pills and appointments add up
TAKE YOUR TIME
Driving, waiting rooms, rescheduling
NO MOVEMENT
Heat alone doesn't move a stiff back
Real Customers, Real Words
Easy To Use
“It's easy to use and has an adjustable intensity, which is great. It's great that it can operate in four modes simultaneously: vibration, air, electric and heating.”
Dale Prochaska · Buffalo, NYVerified purchase
You Feel Quality And Luxury
“Beautiful and good, and the materials used in the device make you feel quality and luxury.”
Rhonda Kessinger · Allentown, PAVerified purchase
Good Effect
“I got it at a good price. It actually seems to be having a little effect on my back pain.”
Darlene Schroeder · Toledo, OHVerified purchaseTry It For 30 Days, Risk-Free
Here's the deal: we want you to be sure before you keep it.
Use the Rena massager every night for 30 days. If you're not happy with it, send it back and we'll refund you.
In other words, you only keep it if it earns a place in your evenings.
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30-Day Risk-Free Trial
3 Simple Steps To Your Nightly Reset
Press Auto and relax.
STEP 1
Charge it with the USB cable and a 5V/2A phone charger. About 2 hours of charging gives about 2 hours of use.
STEP 2
Place it on the floor or a firm, flat surface and lie down with it under your lower back.
STEP 3
Press Auto on the remote and relax for 10 minutes while it warms, lifts, rocks and vibrates. It stops by itself.
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30-Day Risk-Free Trial
100% SATISFACTION30-DAY RISK-FREE TRIAL
Your order today is covered by our 30-day risk-free trial. If you're not happy with how it feels, let us know within 30 days and we'll refund you.
Questions? Email us any time at support@tryrena.com.
Product Specifications
- FunctionsAir-chamber lift (up and down), side-to-side swing, heat, vibration, EMS pulse (10 levels), red light
- LiftUp to 2 in
- RemoteAuto, On/Off, Heat, Up, Down, Vibration, Swing, Red light, EMS
- Timer10-minute auto mode
- BatteryRechargeable; about 2 hours to charge, about 2 hours of use; USB cable, use a 5V/2A phone charger (not included)
- Size16.6 × 7.7 × 3.0 in; base plate 15.4 × 7.7 in
- In the boxMassager, remote, USB cable, manual
- Best usedOn the floor or a firm, flat surface
- Trial30-day risk-free trial; if you're not happy with it, we refund it
- NoteMade for relaxation after long days of sitting or standing
Frequently Asked Questions
What Does It Do?
It's a slim, curved massager you lie on. An air chamber gently lifts your lower back up to 2 inches and lowers it, the top can rock side to side, and built-in heat and vibration massage the area. It's made for relaxation after long days of sitting or standing.
What Does “Treating The System, Not The Symptom” Mean Here?
Most quick fixes work on the sore spot for a few hours. This massager works through the whole lower back at once, with heat, a gentle pressure lift and movement, so the muscles that hold you up all day get warmth and movement too. It's made for relaxation, not to treat any condition.
How Long Do I Use It?
Press Auto and it runs for 10 minutes, then stops by itself. Most people make it a nightly habit, 10 minutes on the floor before bed.
Where Can I Use It?
On the floor or a firm, flat surface. On a soft mattress the lift and the swing lose most of their effect.
What Are The EMS And Red-Light Keys?
EMS is a gentle electrical pulse with 10 levels; start at the lowest level. Don't use it if you have a pacemaker or other implanted device, are pregnant or over broken skin. The red-light key turns on a soft red light setting. Both are optional.
How Do I Charge It?
With the USB cable and a 5V/2A phone charger (not included). About 2 hours of charging gives about 2 hours of use.
Is It Right For Me?
It's made for relaxation, not to treat any condition. If you have a diagnosed back condition or are recovering from surgery, ask your doctor before using it. Stop if anything feels uncomfortable.
How Do Shipping And Returns Work?
Every order ships with tracking. If you're not completely satisfied, the 30-day risk-free trial makes it easy to send it back for a refund.
*Results vary from person to person. The Rena 4D Lumbar Stretch Massager is made for relaxation and is not intended to diagnose, treat, cure or prevent any disease. Ask your doctor before use if you have a medical condition, a pacemaker or other implanted device, are pregnant, or are recovering from surgery. Use on a firm, flat surface. Do not use while sleeping. Photos of people are models unless stated otherwise.
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