Keep your BlackBerry smartphone horizontally aligned on your belt for easy accessibility with the BlackBerry Horizontal Holster. It features a leather wrapped metal clip to attach onto a belt waistband or briefcase. Grooves run along the inside of the case to protect the trackball. Plus a magnetic proximity sensor determines if your BlackBerry smartphone is in its case and shuts off the screen to conserve battery life while giving you the option to choose unique notification settings for incoming calls and other functions.