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Master security : http://howsecurity.com

Portable BungeeAir fob attaches to your keys or handbag
Free BungeeAir app gives you control of the wireless security tether functionality and settings
Integrated lithium polymer battery case adds 4 hours of power for talk time to your iPhone 4
Case has a built-in 2-position stand to hold your iPhone in landscape or portrait mode
Download the Kensington BungeeAir application from the Apple App store at no extra cost - compatible with iPhone 4