This locking mechanism is made for safety and portability of digital devices such as mobile phones, pagers, walkie-talkies, XM Radio and Sirius Radio receivers. The design is simply the best, providing the most versatile carrying option on the market today! The high quality "Positive Locking Mechanism" feature assures your mobile device will stay at your side and will not come out of the holder when bending or moving about. This product has been tested by many law enforcement agencies across the country, proving the Belt-Lok Kit is the most dependable locking system available! Also included is a special key ring adapter, which allows you to carry your keys on your Belt Lok System without the risk of losing them. Package Details: Includes: • Belt-Lok • Positive Locking Mechanism • Installation Instructions on Back Cover • Key Holder Adapter Product Features: • Bonus Key Carrier • Designed For Heavy Use • Positive Locking System • Lifetime Guarantee • Trusted by many Law Enforcement Agencies Technical Specifications: Model #: BLK-203 Manufacturer: Bracketron Dimensions: n/a Weight: 1 lb. Available Documentation: In order to view our radio hardware manuals online, you'll need to have Adobe's Acrobat Reader installed on your computer. If you don't yet have Acrobat Reader, please visit Adobe's web site to download the reader free of charge. none