Part of the D20 Multi-tool battery system. Versatile and durable speaker designed to connect wirelessly to mobile devices.er. In addition, it is equipped with one auxiliary port for MP3 compatibility and one USB port for charging mobile devices. As part of our core range, this speaker is suitable for enthusiasts and tradespeople alike. Any application other than that it was intended for, is considered misuse. For maximum versatility, it is powered by D20 batteries. Batteries and charger are available separately. D20 interchangeable battery system allows you to combine one battery with any of the tools within the D20 series.