Two pads.
One quiet device.
Relief that works around your life.

TENS 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.