Bluetooth is an engineering design for wireless personal area networks (PANs) which offers many ways to link and swap information between devices such as mobile phones, PCs, digital cameras, printers, laptops, and video game consoles over a safe, worldwide unlicensed short-range radio frequency. Nowadays, the Bluetooth technology is implemented in a range of latest products such as phones, printers, modems, and headsets. Bluetooth is suitable for situations when two or more devices are connected to each other and don't require high bandwidths.

A popular accessory is a Bluetooth headset, small and lightweight, with some models weighing less than an ounce (28 g). It offers up to five hours of talk time and for as long as 100 hours of standby time. The Bluetooth headset permits you to use your phone without wires even if your mobile is inside a bag, pocket, piece of luggage, or in a nearby room.

Bluetooth is most frequently used with phones and hand-held computing devices, either using a Bluetooth headset or moving files from phones/ PDAs to computers.

Comfortable design and easy to use features can be found with the Sony DR-BT22 Bluetooth stereo headphone. This headset allows you to fully utilize the features of your stereo music enabled phone. You can make calls or even listen to your favorite music with the same device. This very light headset is proposed for wearing in comfort and can even be folded for being handy. It is well-matched with all stereo Bluetooth-enabled phones such as A2DP, AVRCP, HFP & HSP and has the following features:
1.) A 30mm (diameter) driver unit of headphone,
2.) Operates basic functions by remote (Play/ Stop/ Pause/ FF/ FR), folding mechanism for easy portability and storing,
3.) Up to 11 hours talk time, and
4.) Up to 100 standby time. Package includes headphones, AC charger and users manual.

Manufacturer's Description
• Enjoy listening to music wirelessly with other Bluetooth(R) audio devices (A2DP).
• Can talk when you receive a phone call using the hands-free function (HFP/HSP).
• Lightweight headset for comfort-wearing and easy to carry anywhere.
• Operate basic function of other Bluetooth(R) audio devices with the use of remote control (AVRCP).
• Folding mechanism for easy portability and storing.
• Useful rechargeable function.
• AC Adapter is included in the package.
• Driver Unit 30 mm Frequency Response 14 - 24,000 Hz.

Detailed Specifications:
Audio
• Frequency Range: 100-4,000Hz
• Frequency Response: 14-24,000Hz
• Driver Unit: 30mm diameter, dome type
• Band: 2.4GHz band (2.4000GHz-2.4835GHz)

General
Type of Use: Open air, dynamic

Inputs and Outputs
Output(s): Bluetooth power class2

Power
• Battery Charging (Approx.): 3 Hours
• Battery Life: Approx. 11 Hours (Continuous music play back time)
• 100 hours (Continuous communication time)
• 100 Hours (Waiting time)
Sony Warranty Included:
• 1 Year Limited Warranty
• Service available through authorized repair center
Compatible Devices
• AT&T: Tilt
• BlackBerry®: Curve 8310, Curve
• Cingular: 8525 , 3125
• HP: hw6515
• LG: CU915, Trax , CU515, CU500v , CU920, Shine, CU500
• Motorola: RAZRV3, V3xx, KRZR, Moto Z9, Moto Q Global, MOTORAZR2 V9
• Nokia: 6555, 6085 , 6085
• Palm: TREO750
• Pantech: Duo
• Samsung: A717 , BlackJack, A737, A727, A737 , Acess, A737 , A517 , SLM, BlackJackII, BlackJack
• Sony Ericsson: W580i, Z750a
Sony DR-BT22 Bluetooth stereo headset will surely give you satisfying and best performance you've ever wanted in terms of headset.

Customers can also have their own Sony Bluetooth headsets in many other types and designs, with variable colors to choose from, depending on what moods and lifestyles they have. Most of their customers find its design very cool and very convenient to carry wherever they go.