The round Touchstone is smaller than you might imagine; it's about the diameter of a 12-ounce can of soda and it stands less than two inches tall at its highest point. The top surface of the Touchstone is slanted downward toward you, to better position the device for use while charging, thus its height varies.
There's also non-slip material on the bottom of the dock, according to Palm, to help ensure that the Touchstone-and your Pre-stay put. (A series of strong magnets in both the Touchstone itself and the corresponding battery cover work to keep the device sturdily in place while charging.) The Touchstone is meant to be employed while the Pre's in use, so you can do tasks like check calendar entries, place calls via speaker phone and watch videos in both portrait and landscape mode, all while the Pre's charging.
there's a microUSB port on the Touchstone, which is used to connect to a charging cable. I don't expect the wireless charging dock to come with its own charging cord, so you'll very likely need to employ the one that comes with the Pre-or any other compatible microUSB cable.
suggested that the Touchstone-specific Pre back cover might ship with the charging dock, Hands-On With the Palm Touchstone at CES
One downside to the Touchstone and its inductive charging process: it takes approximately four hours to fully charge a dead Pre, according to Palm. That's roughly double the time it takes to charge a BlackBerry or other comparable smartphone via traditional charging cords and electrical outlets.

The Touchstone is also strictly a power supply unit, and it cannot be used to sync data between the Pre and a computer, as is the case with some other comparable charging docks.

Wireless charging isn't exactly new; however, most existing cord-free power solutions involve some sort of bulky charging "mat" or "pad" that sits on a desktop while charging various devices. I must say, Palm's Touchstone is the...

Input Voltage: 100-240V AC,50-60Hz UniversalOutput Voltage: 7.5VDC
Output Current: 3A 
Standby Current: 0.011A  
Adapter Power: 22.5Watts

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