Winner of the "Best of Innovations" award at the 2010 International Consumer Electronics Show, this is the wireless watchdog that sounds an alarm when you and your cell phone are separated by more than 30 feet. Slipped onto a key ring or clipped to a belt, this Bluetooth device will vibrate, flash its LED light, and beep when its paired cell phone is left behind at a table or in a taxi, or taken from an open purse. It also signals incoming calls, functions as a remote Bluetooth noise canceling speakerphone, and doubles as a piercing panic alarm with an emergency number autodialer. About the size of a poker chip, the device's rechargeable Li-ion battery provides two hours of talk time (three days of standby security time) on a four-hour charge from the included AC charger or USB cable. 1 3/4" diam. x 3/4" D.