The distinctive design feature of the AK70 portable audio player is the concavely tapered longitudinal edge into which the volume control with knurled pattern is embedded. The user can comfortably operate the volume control without slipping. The player is lightweight and only 13 mm thick, fitting well in the hand and into any bag. The colouring in shimmering mint green gives the player a subtle freshness, distinguishing it from conventional consumer electronics devices.