I have a microsoft external keypad, bluetooth, I believe it is a 1558 model. I have looked how to connect it to my MacBook Pro, however all the sites say to turn it on. It does not have a power switch. The battery was replaced today. My question is this, is there a number or key. or combination of keys that will turn on a the discoverable bluetooth or is there an alternate way of getting my mac to see the device? If there isn't I have 5 CR2430 batteries for sale. Thanks Iain