Probably helping to justify the extra cash for the Middleton is its sufficient 20-hour battery, which places it out before many competition within the price range, including the JBL Pulse 5 and in some cases the Sonos Transfer. The Go 4 is amongst the initial portable Bluetooth speakers around https://www.bluetoothspeaker.top/indoor-rgb-wireless-speaker-with-bluetooth-powered-by-battery/