When you get a call, the thing's got to come off your wrist and be held up to your ear unless you've got a Bluetooth headset ready to rock, but worry not: Neutrano's also showing a model of its Nutec WristFone that pops off at the base of the wristband so you don't need to unstrap it from your wrist.

ENGADGET: Neutrano's Nutec WristFone watch phones at CTIA Mobile

The 33-year-old New Zealand-born model had cited "irreconcilable differences" as the cause of her split with rock star Stewart, 58.

BBC: Hunter drops Stewart divorce

Merseyside-born Costello, born Declan MacManus, emerged on the back of the late 1970s UK punk rock movement with his band The Attractions, recording a string of successful albums including This Year's Model, Armed Forces and Get Happy.

BBC: The couple met during last year's Grammys