Bluetooth 4.0

What Does Bluetooth 4.0 Mean?

Bluetooth 4.0 is an optimized version of the proprietary wireless Bluetooth technology standard for data exchange over short distances. Bluetooth 4.0 enhances Bluetooth technology while maintaining compatibility with classic Bluetooth-capable devices.


Bluetooth 4.0 uses low energy technology, allowing manufacturers to include Bluetooth in small battery operated devices. This new energy specification is a key benefit for developers and consumers of handheld and compatible devices.

Bluetooth 4.0 is also known as Bluetooth Smart, Bluetooth Smart Ready and Bluetooth Low Energy (LE).

Techopedia Explains Bluetooth 4.0

At the time of its October 2011 release, Bluetooth 4.0 was only included with iPhone 4S, Macbook Air and Mac Mini devices. However, Bluetooth 4.0 is backward compatible with earlier Bluetooth versions.

Bluetooth 4.0 is geared toward the fitness/health industry and built for sensor devices, such as pedometers and heart rate monitors, which include a Bluetooth 4.0 radio capable of exclusive communication with Bluetooth 4.0 devices.

Bluetooth 4.0 devices employ dual-mode radios, which facilitate Bluetooth 4.0 transmission while using classic Bluetooth technology, such as mobile device connectivity. This means that an iPhone 4S (a Bluetooth 4.0 device) can gather information from a Bluetooth 4.0 pedometer while connected to a traditional Bluetooth device, like a car stereo.


Related Terms

Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.