The Yealink SIPPWR5V.6A-USB-AU is a USB power adapter with 5V 600mA power capacity and designed to work accurately with Yealink DECT W53 and W56H DECT cordless phone. Features • Product Type: USB Power Adapter • Power capacity : 5V 600mA • Colour: Black • Designed for : Yealink Dect W53 and W56H Phone