Yealink IP Phone & Yealink Base Stations T19, T21, T23, T27, T31G, T31P, T31W, T40, T41, T42, T43, T44, T53, T53W. The Yealink device will only draw the 0.6A it needs. The adapter will run cooler and under less stress, which is generally better for the device's lifespan.
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