Delton Premium BlackBerry 9630 Bold Sleep Mode Holster Sleep Mode - designed to conserve battery life, embedded with the Blackberry sleeper switch technology, this holster will activate power saving options when your device is inserted The locking mechanism ensures that your device is held securely in the holster at all times 360 degree roating clip with 24 different locking positions. different notification settings (ring, vibrate or both) based on whether your handheld is in or out of this convenient holster. Interior velvet lining helps reduce friction from repeated use