A TENS unit, such as the InTENSity 10, is often recommended to be used for the relief of chronic intractable pain, acute post-traumatic pain, acute post-surgical pain, and arthritic pain, among other conditions.

InTENSity 10 Digital TENS Unit
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1-InTENSity 10 unit (with 10 preset programs)
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1-(2/pk) lead wires
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1-9 volt battery
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1-AC Adapter
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1-(4/pk) reusable electrodes