The Coast Bluetooth(r) speaker and wireless charging pad is a must have for any desktop! When the Bluetooth(r) speaker is plugged in with the provided Micro USB cable, the top part of the speaker functions as a wireless charging pad. The speaker connects with Bluetooth(r) but needs to be plugged into a power source i.e. laptop, power bank, or USB outlet. 2 Watt speaker output. 5 Watt wireless charging output. Bluetooth(r) version 4.2.