Boat Stone 200 is water resistant and shock proof to suit your active, outdoor lifestyle The body is constructed of durable rubber matte finish which offers all around outdoor protection against dust and water. The buttons at the top include volume rockers , play/ pause button and next / previous tack you will be surprised you by its well-balanced crystal clear sound and robust bass . It produces very clear and crisp sounds . clarity is the key word . It produces a very decent amount of bass and can go quite loud that make this a little beast, which is nice because you have the option to really crank this speaker up if ever needed. I tested it across various platforms like sonyliv , hotstar , jiocinema , amazons prime vidoes , youtube , voot etc over ,more than a month and the results were the same , that is impressive . In all cases the sounds were real ,very life like , very clear, crisp , loud enough and had a punchy bass. The Bluetooth 4.1 transmission ensures no loss of audio performance . The portable speaker can be paired with all types of devices that use Bluetooth technology and you can also connect the speaker with aux It has a 30 feet bluetooth range and 3W power output It has a Built-in microphone for hands-free calls, online chatting and volume control with a single button you can answer, end or refuse the calls. Phone calls i made very extremely clear both for me and for the person on the other end . Enjoy 10 hours of music at 80 percent volume, up to three times longer than similar-sized portable speakers Recharge your 1500mAh battery in just 4 hours using the included Micro USB cable. To know how much of battery life remains ..you will find an visual indicator on your phone ..that will give you an idea how much juice is left . If you charge the speaker while its off a red led glows and stops glowing when the charging gets over in about 4 hours . If you Charge the speaker while using it , you will see a pinkish purple led glow instead . One is able to use these speakers even while they are being charged . when you are connected via bluetooth and not charging the device , the led will turn Blue instead . The same LED turns blinking Green when the battery is about to die and the speaker starts to beep every few seconds . To establish a bluetooth connection first pair it with your phone / laptop / desktop/ tablet etc and turn the bluetooth on, on both the devices ..in about few seconds both the devices will be connected via bluetooth . The pairing needs to be done just once . So Lets conclude - Sure the speaker is a little heavy and not really an eye candy , but its rugged , very much sits in the palm of your hands and hence very portable . There is a not a single point I can cut for its performance . Its Fantabulous . and the fact that the battery can go upto 10 hours makes it a winner in a marathon runner . Although the vibrations that the speaker produces is very heavy , they made sure the base is rubberised and hence anti - skid . Although the MRP is around 3000/- , you can get it around a 1000 / 1100 Rupess . With 1 yr warranty alongside its hard to resist . Mohit Manuja of http://QualityLessons.Net