The speaker is very good the sound is loud and clear . The charging time is 30 mins and it last for around 4hrs on continuous usage . It is grey black in colour with a black band at its buttom and the top from where the main sound comes out . Sound effect is very nice when u are watching a movie in phone u can feel the sound direction . Which is dolby atmos feature is there . Apart from it u can connect the device with your smartphone via bluetooth or via 3.5 mm jack . And it has a usb type b port to charge it . Overall its value for money.