Cellphone maker Nokia on Tuesday unveiled a low-power, short-range radio technology whose energy efficiency makes it suitable to use in small devices.

The new Wibree wireless connection technology can be used in conjunction with existing Bluetooth technology in items such as wristwatches, where the older standard may not be practical due to its power needs.

"It's up to 10 times more energy efficient than Bluetooth," Bob Iannucci, head of Nokia Research Center, told a news conference.

Like Bluetooth, Wibree would wirelessly link devices up to a range of about 10 metres.

The new technology's first commercial version would be available to manufacturers by the middle of next year, Nokia said in a statement.

Bluetooth is currently used in items such as cellphones, headsets, computer keyboards and printers to transmit phone calls, images or other data from one device to another.

Wibree will operate on the 2.4 gigahertz frequency commonly used by devices such as cordless phones — the same frequency range used by Bluetooth.