Veridian Healthcare® TENS Unit with Heat Conductive Knee Wrap Single-Channel (1226081_EA) 1/EATENS unit with heat conductive knee wrap targeted therapy with three settings TENS + heat, TENS only, heat only provides temporary pain relief. Two comforting heat levels Eight pulse modes 20 intensity levels Electronic nerve stimulation Secure, magnetic connectors 10 60 minute programmable sessions with an automatic shut off Single channel output rechargeable internal battery