Bluetooth loudspeakers from Grunding stand out by their easy handling. Music comes from the user’s smart phone or tablet. The careful combination of chassis and integrated amplifier creates a sound quality which is definitely about average in this category. The integrated Lithium-Ion battery provides hours of network-free operation. The handling can be learned in no time at all and is then fully intuitive. The materials and the design harmonically round off the overall image of the Grundig GSB 600.