The E5 is a wireless speaker with smart functions and integrated Alexa Voice Service. With a thickness of only 42 mm, the device can be used both indoors and outdoors. The removable leather strap is particularly functional as the speaker can be carried like a handbag. The unit is equipped with four drivers and two subwoofers; bass and treble can be quickly adjusted with two well-accessible rotary knobs. The rechargeable battery supplies power for up to 15 hours. It is possible to charge other mobile devices using the USB port.