Hey guys, I was wondering which Bluetooth adapter I needed to buy to be able to pair my phone with the stereo speakers so i can take/make calls through my stereo, I've been doing some research and there's 2 adapters I can buy, but I'm not sure which one I should buy:

Kenwood KCA-BT100

Kenwood KCA-BT200

Obviously, the 200 model is WAY more expensive than the 100 model, I really don't want to spend that much money so i want to go the cheapest route, My question is, will the 100 model work with my stereo? or will I need to buy the 200 one. I've seen about 3-4 websites that tell me to buy the 200 model but I'm wondering wether or not it's necessary. If the BT100 model works I'll be happy, any help is appreciated, thanks.

Mitch