With its durable leather exterior and soft interior, the BlackBerry Leather Swivel Holster is an ideal home for your BlackBerry device. This case's swivel clip provides maximum comfort and flexibility no matter where your day takes you. 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.