The device
"Nobody knows it's there."
- Wireless dual-zone TENS unit
- 6 modes · 16 intensity levels
- 10-hour battery · USB-C charge
- 1 set of electrode pads (4 pads)
- USB-C cable included
£79
Wireless dual-zone TENS · Class IIa medical device
Two zones. One device. Relief that works while you do.
Back and neck pain peaks around 2pm. Arca sits under your work shirt — treating two pain points at the same time, while you get through the 1-hour call.
6 modes
10-hour battery
98g
£84
or split with Klarna · Clearpay
UKCA & CE marked
Same-day dispatch
60-day guarantee
Find the right fit
Every order ships same day from Bristol. 60-day guarantee on all.
The relief bundle
- Wireless dual-zone TENS unit
- 8 electrode pads (2 sets — ~3 months of daily use)
- USB-C cable
- Canvas carry pouch
£84
Save £5 vs device alone + 3 months of pads included
Pad refill plan
- 1 set of 4 electrode pads every 6 weeks
- ~40 sessions per set
- Save 10% vs buying individually
- Skip, pause, or cancel any time
£9 / 6 weeks
~£81/year — pads that stay sticky
The maths
The maths most people haven't done
What the current routine actually costs over a year — versus a year with Arca.
Ibuprofen, one pack a week200mg × 24, Boots own-brand
£52
Heat patches, two a weekDeep Heat, Cura-Heat — Boots pricing
£100
Physio sessions, eight a year£55 per session, UK average
£440
A year of the current routine
£592
A year with Arca
£120
Bundle (£84) plus a year of pad refills (£36). Pays for itself in twelve weeks.
Figures based on Boots high-street pricing (Apr 2026) · CSP physio fee survey 2025 · NICE NG59 guidance.
Find your routine
“Is this just my life now?” — It doesn’t have to be.
The desk-day ache
Lower back tightens by midday. Neck stiffens during afternoon calls. Pain peaks when you finally stop. “Sitting at my desk job is killing me.”
Get the desk worker routineThe runner’s recovery
DOMS that lasts three days instead of one. Hips and lower back that argue back after any distance over 5k.
See the post-run protocolPostnatal back pain
Lower back pain that carried on well after the birth. Holding, feeding, and sleep deprivation stacked on top of each other.
See Joanna’s routineSciatica and nerve pain
Pain that shoots from lower back into the leg. Worsens after long periods sitting. “10 minutes in either of our cars is absolute torture.”
See Priya’s protocolLong-haul travel
Economy seats, airport walks, and a stiff back that arrives two hours before you do. Recovers slowly, ruins the first day.
See the travel resetGeneral body fatigue
Full-body ache that drains evenings and affects sleep. “Every night is a struggle.” “My 40s are hitting me hard.”
Start with the basicsWhat the research actually says
“I feel like I’ve tried everything and nothing has worked long term.” Here is what the research says about what actually does.
64%
Increased ↑
Meaningful reduction in chronic pain
Reduction in chronic musculoskeletal pain in a peer-reviewed trial comparing TENS to placebo. Most participants reported improvement within the first week.
🔗 Vance et al., 2014
41%
Increased ↑
Better neck mobility vs control
Improvement in cervical range of motion in participants using TENS on the neck versus a control group.
🔗 Johnson & Martinson, 2018
2.3×
Increased ↑
Faster DOMS recovery
Faster recovery from delayed-onset muscle soreness compared to rest alone, measured at 48 hours post-exercise.
🔗 DeSantana et al., 2020
Trustpilot
4.7 · 1,353 reviews
What people say.
1,353 reviews and counting, from people who actually use Arca every day. Filter by the pain context that sounds most like yours.
Showing 1,353 reviewsRead every review on Trustpilot →
What a year of pain actually costs
| Other options | Arca wireless TENS | |
|---|---|---|
| Drug-free | Not always | ✓ |
| Use it whenever you need it | Dose limits, booking required, or app dependency | ✓ |
| Works during normal life | Rarely | ✓ |
| Predictable ongoing cost | Recurring or £55+/session | £9 every ~6 weeks |
| Designed for chronic pain | General purpose or gym recovery | ✓ |
| Wireless, no app needed | ✗ | ✓ |
Categories, not brand names. Every Arca tick is the default behaviour out of the box.
Take the routine, even without the device.
Free seven-day desk worker relief protocol — eight specific exercises and pad placements you can start today.
Eight specific exercises and pad placements, compiled from peer-reviewed protocols and clinical guidance. Yours whether or not you buy the device.
“I want my life back.” Start here — it costs nothing.
For the curious
Questions people actually ask
Short, honest answers. If yours isn't here, we reply within four hours on weekdays.
Talk to a humanTENS stands for transcutaneous electrical nerve stimulation. Two small pads sit on your skin and deliver gentle electrical pulses to the nerves underneath. These pulses interrupt the pain signal travelling to your brain and also prompt the body to release endorphins — its own pain-blocking chemicals. It is the same technology used in NHS physiotherapy clinics. NICE recommends TENS for chronic musculoskeletal pain (guideline NG59).
Most TENS units treat one area at a time. Arca has two independent wireless channels — so you can treat your neck and your lower back simultaneously in a single 15-minute session. No leads connecting pads to a controller. No app to set up. One button on the device. It weighs 98g and sits quietly under a shirt.
No. You control the intensity with one button — from a faint hum to a firm pulse. Most users settle around level 8 of 25. If it ever feels uncomfortable, one press drops the intensity immediately. The session ends itself after 15 minutes.
The pads work on the neck, upper and lower back, shoulders, hips, thighs, and calves. Do not place them on the front of the throat, directly over the chest, on broken or irritated skin, or on the abdomen during pregnancy.
Most users notice a clear reduction in pain during or just after the first session. Deeper and more lasting relief tends to build over the first two weeks of daily use as the body adapts to regular stimulation.
One or two 15-minute sessions per day is a standard starting point for ongoing pain. There is no clinical upper limit for TENS sessions — it is safe to use as often as is comfortable. Many customers do one session mid-morning and one in the late afternoon when back and neck pain typically peaks.
Use Arca every day for 60 days. If it has not made a meaningful difference to your pain, email us and we will arrange a full refund. No usage questionnaire, no restocking fee, no return shipping cost. The commitment is entirely ours.
Around six weeks of daily use. The adhesive gel degrades gradually — when a pad stops sticking reliably it is time to replace it. A four-pad refill pack costs £9 and ships free.
Anyone with a pacemaker, implanted defibrillator, or other active implanted electrical device should not use TENS. Also avoid if you have a history of epilepsy, active deep vein thrombosis, or a heart condition — and check with your GP first. Do not use over the abdomen or lower back during the first trimester of pregnancy.
Avoid the abdomen and lower back during the first trimester. From the second trimester onward many women use TENS on the lower back for pregnancy-related discomfort — but speak with your midwife or GP before starting, particularly if you have any complications.
Yes — it is designed for exactly this. The pads sit under a shirt, the device clips to a waistband or sits in a pocket, and the 15-minute cycle ends itself. No interruption to you. Most customers start a session about an hour before their afternoon pain peak.
Arca has six programmes — TENS and EMS. TENS modes interrupt the pain signal at the nerve. EMS (electrical muscle stimulation) modes engage and contract the muscle more directly, which is useful for loosening a tight area, improving local circulation, or recovering after exercise. You step through all six with one button.