The Coast Bluetooth Speaker and Wireless Charging Pad is a must have for any desktop! When the Bluetooth Speaker is plugged in with the provided Micro USB cable the top part of the speaker functions as a wireless charging pad. Meaning it can charge any device that can be charged through wireless charging. The speaker functions off of Bluetooth but needs to be plugged into a power source i.e. laptop, powerbank, or USB outlet. 2 Watt Speaker Output. 5 Watt Wireless Charging Output. Bluetooth version 4.2.