The simple square box style has been growing in popularity for action cameras, and with the HERO4 Session GoPro becomes the latest manufacturer to launch a camera of this style, following the likes of Polaroid's Cube and Cube+, and the Rollei 500 Sunrise.
BBC:
GoPro has announced a new camera that is smaller and lighter than its earlier models.
The US firm already dominates the action-cam market, having sold more than $363m (£233m) worth of goods over the first three months of the year.
