The soloist that attracts the crowds. With this device, you won't be solo for long: The Bluetooth speaker GBT Solo magically draws in fellow partygoers, as it offers a rechargeable lithium-polymer battery with a runtime of up to 20 hours. After that, even the most enduring dancer will likely head home satisfied. Music streaming is possible from a distance of up to 30 meters. Thanks to a total output power of 3.5 W RMS, the sound also has an impressive range. You can safely place the speaker on the edge of the fountain on a hot day to enjoy a refreshing splash while listening to music, as the device is equipped with a splash-proof housing.