Want to power your Yealink T18, T19, T20, T21, T22, T23, T26, T27, T28, T40, T41, T42 Gigabit IP Phone from a USB port? With myVolts USB to 5V DC power cable, you can power it from your laptop, phone more→charger, USB power bank - anywhere there is a USB port* Specifications: - Output voltage is 5V - Max output amperage is correct for your device - Barrel size: Tested with, and fits the Yealink T18, T19, T20, T21, T22, T23, T26, T27, T28, T40, T41, T42 Gigabit IP Phone - Input voltage is 5V DC USB In addition, this myVolts-branded replacement USB power cable for Yealink T18, T19, T20, T21, T22, T23, T26, T27, T28, T40, T41, T42 Gigabit IP Phone is: - Compliant with all safety standards, and …