The device has a good sound. Max. Volume is somewhat higher room volume. Battery life at a moderate volume about 5 hours. Here the Bluetooth module has been in my device after only 3 months passed. There can also be no longer reactivate. The blue light is off and no longer flash. Otherwise, the device still works. But a Bluetooth speaker, in which the Bluetooth module holds only 3 Moanate is already disappointing.