Custom-designed for your BlackBerry smartphone, the BlackBerry Leather Pocket keeps it looking good. The durable yet elegant leather construction features a smooth, soft lining to keep your device safe from bumps and scratches. The built-in thumb groove lets you slide your smartphone out easily into your hand in a fluid motion. And inside, hard plastic grooves protect your smartphone's trackball from damage, while the magnetic proximity sensor switches off your smartphone screen as soon as you put it away, to preserve your battery. The sensor can also work with your device to enable it to switch notification settings depending on if your device is in or out of the case.