I had already Wavemaster mini speakers to easily expand on the iPhone Travel Speaker. Found the mini speakers actually pretty good, but the short cable has always annoyed. The SBT50 speaker is an entirely different league. Of course, one hears no HiFi sound, but it is sufficient to fast times on the road or in the basement to use the mobile phone as an audio source and with good sound similar music to hear. The battery lasts long enough, the connection via Bluetooth runs automatically quickly and without problems. The device acts robust and also serves as a speakerphone. I highly recommend this SBT50 without restrictions.