3.15'' diameter , Can be used for travel or at home. 600mAh battery capacity is able to playing 4-6 hours and stand by 72-80 hours.Charging time: 1 hour. And it comes AUX port and TF card port as well. This speaker built-in mic for handsfree call. And it comes bluetooth FM transmitter as well. Imprint is avaliable and location could on the top and side. Add your company name or logo for maximum visibility.