The little speakers that deliver big sound.

It's hard to find genuinely portable speakers that don't deliver the kind of tinny bass and muffled sound quality you'd expect from a clock radio.

Jawbone managed to fill the gap with their tiny JAMBOX and have followed up that success with this bigger version cleverly named BIG JAMBOX.

The set up is the same - it wirelessly connects to any Bluetooth® enabled device – smartphones, tablets and computers – to stream any audio - music, movies, games and phone calls.

It's still pretty small as well at just 2.7 pounds, but inside there's now room for improvements to the digital signal procesother and equalising technology amongst other tweaks resulting in sound you don't anticipate coming from something you could slip into your coat pocket.

There's a built-in mic for phone calls too, 15 hours of battery life and you can customise the slightly grating sc-fi automated voice that greets you when you turn it on.

BIG JAMBOX comes in three designs (RED DOT, WHITE WAVE, and GRAPHITE HEX)

(£259, Jawbone)