this is a bid for an Anti-theft device/ Bluetooth Alarm. This small device connects wirelessly via Bluetooth to your favorite gadget and it will set off an alarm if that gadget will be taken away more than five meters (16 feet). Product Features When the device is take away more than 5M (meters), the alarm will give a beep sound continuously, that alert you of that your device is not nearby Missing call notice ? The beep sound will be hear one there is a in-coming-call Built-in rechargeable battery Wireless Bluetooth transfer Compatible with most Bluetooth ? enabled devices, such as cellphone, PDAs and notebooks Dimension: 25 x 40 x 10mm (approx.) Weight: 8g - 100% Brand New item - Charged by rechargeable battery build-in (by USB) - Alarm rings over 5 meter - English manual is provided - compatible to iPhone 3G /4G /4S /iPad/ iPad 2/ iPad 3 or any cell phone with build-in bluetooth function Package include : 1 x Bluetooth Alarm Keychain Black or white 1 x use manual 1 x Usb cable Check out my other items!