Gehr Portable Wireless Bluetooth Stereo Speaker: Small Unit, BIG Sound - Grey Portable - 4.1 x 2.95 x 0.9 inch size easily fits in your pocket or toolbelt! Colossal Sound - Two active drivers and 2 passive radiators produce loud, 2-channel stereo with deep bass, crisp trebles and remarkable vocals. Includes USB Power Cable, Audio Output Cable and User Manual.