... There is an optional battery pack for the Pulse Flex that can also be fitted with AA batteries in case the power runs out on the road and the nearest socket is far away. All other units must be permanently connected to the mains. All tested devices offer connection options beyond AirPlay 2: Sonos, Bluesound and Yamaha have even equipped their devices with Ethernet network sockets. ...

The Bluesound Pulse Flex 2i pleases with its compact dimensions and the resulting flexible - nomen est omen - application possibilities. A battery pack is available as an option for a rather hefty 80 EUR, which expands the range of use of the speaker with dual-band WLAN and Bluetooth...

It is worth taking a good look before buying your first multi-room speaker. Problems with synchronisation are a thing of the past, but the differences become apparent when it comes to the topic of supported radio protocols, the number of music services that can be called up or the ease of use...