I ordered this for use with my Palm Centro, which has the H500 listed in its supported bluetooth devices. While I'm able to pair them, the Centro will not transfer calls to the device. I've successfully used a number of friends' devices, so I know the Centro can work, but the model number on the back of this little pink Motorola BT device is NOT H500 - it's H505. In searching on Motorola's web site, I can't even find information about this model, except some vague references that it may be a special model created for Verizon. Hmmm - too bad for me, I'm using Sprint. My husband's Motorola Q thru Verizon works great with this device - and he loves it, thus the 3 stars, but it seems to be incompatible with my device. Had Amazon described it with the correct model number, I'd have researched the compatibility with the Palm first.