ThinkGeek has a watch with Bluetooth 2.0 that pairs with your cellphone so you can see caller ID information right on your wrist without having to take your phone out of its case. When your phone rings, the watch vibrates against your wrist to let you know you have a call. There’s even a button on the watch to mute your phone’s ringer. The caller ID is a 96 X 16 pixel OLED display. The watch has a stainless steel case, a leather band, and a rechargeable battery. It’s available for $69.99.