Belifu 4 Independent Channel TENS EMS Unit, 24 Modes,30 Level Intensity Muscle Stimulator Machine, Rechargeable Electric Pulse Massager with 10 Pads&5 Set Leads Wires, for Pain Relief Therapy(Black)

Why it's worth it

The Belifu runs four fully independent channels with 24 modes and 30 intensity steps, plus a rechargeable battery and ten pads. It costs a fraction of the premium units while covering more of your body at once.

Four independent channels for this little money is genuinely unusual. You can treat both knees, both hips, or your lower back and both legs in one sitting instead of running three sessions back to back. Each channel takes its own mode and its own intensity, so a tender spot gets a gentler setting than a thick muscle. That flexibility is normally reserved for units costing several times more.

Thirty intensity levels give you finer control than most units in any price range. More steps mean you can land on the setting that's strong but still comfortable rather than bouncing over it. On a bony area like a wrist or the top of a foot, one increment can be the whole difference between therapeutic and unpleasant.

From our review of 10 tens units, by Eleanor Vance, Health & Beauty Editor

What we like

• +Four independent channels for this little money is genuinely unusual
• +Thirty intensity levels give you finer control than most units in any price range
• +The rechargeable battery pays for itself quickly if you use it often
• +It clips to your belt and comes with what you need

What to know

• –Four channels also means eight pads and a fistful of wires
• –The small screen packs in a lot of information
• –Build quality is where the savings show