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What is the warranty on refurbished units

it provides accurate cylindrical axis readings for astigmatic lenses

Electric height adjustment system

Chattanooga 77710 Portable TENS Unit OBGYN Table https://youtuChattanooga 77710 Portable TENS Unit comes with dual independent channels & 3 stimulation modes. The clip can easily be attached to your clothing so you can easily take it with you any where. Chattanooga Portable Electrotherapy Intelect TENS Basic Unit has dual, independent channels 3 stimulation modes (Burst, Normal, Modulation) Comes standard with: Lead wires 9 volt battery DURA STICK electrodes Carrying case Battery charger is available (sold