Average Reviews:
(More customer reviews)This is NOT the new 3.0 + HS Bluetooth standard protocal. It DOES NOT use AMP/PAL which uses the colocated 802.11 at speeds up to 24Mbits/second. NOT the 1 to 3 Mbits/second of the old 2.1 Bluetooth that this Cirago uses.
It is very misleading for Cirago to 'cash in' on false advertising claims. Cirago's claim to the 3.0 in the name has to do with Mbits/second data transfer speeds, hence 3.0Mbits/second NOT Bluetooth 3.0 HS.
As a 2.1 device it is excellent and merits 5 stars. But shame on Cirago for some dirty tricks.
To understand the significance of this new 3.0 protocol from the older 2.1 a brief breakdown is in order.
History 101:
Bluetooth uses a radio technology called frequency-hopping spread spectrum, which chops up the data being sent and transmits chunks of it on up to 79 bands (1 MHz each) in the range 2402-2480 MHz. This range is in the 2.4 GHz short-range radio frequency band.
Originally Gaussian frequency-shift keying (GFSK) modulation was the only modulation scheme available; subsequently, since the introduction of Bluetooth 2.0+EDR, /4-DQPSK and 8DPSK modulation may also be used between compatible devices. Devices functioning with GFSK are said to be operating in basic rate (BR) mode where a gross data rate of 1 Mbit/s is possible. The term enhanced data rate (EDR) is used to describe /4-DPSK and 8DPSK schemes, each giving 2 and 3 Mbit/s respectively. The combination of these (BR and EDR) modes in Bluetooth radio technology is classified as a "BR/EDR radio".
Bluetooth is a packet-based protocol with a master-slave structure. One master may communicate with up to 7 slaves in a piconet; all devices share the master's clock. Packet exchange is based on the basic clock, defined by the master, which ticks at 312.5 µs intervals. Two clock ticks make up a slot of 625 µs; two slots make up a slot pair of 1250 µs. In the simple case of single-slot packets the master transmits in even slots and receives in odd slots; the slave, conversely, receives in even slots and transmits in odd slots. Packets may be 1, 3 or 5 slots long but in all cases the master transmit will begin in even slots and the slave transmit in odd slots.
Bluetooth v3.0 + HS
Version 3.0 + HS of the Bluetooth Core Specification was adopted by the Bluetooth SIG on April 21, 2009. It supports theoretical data transfer speeds of up to 24 Mbit/s, though not over the Bluetooth link itself. Instead, the Bluetooth link is used for negotiation and establishment, and the high data rate traffic is carried over a colocated 802.11 link. Its main new feature is AMP (Alternate MAC/PHY), the addition of 802.11 as a high speed transport. Two technologies had been anticipated for AMP: 802.11 and UWB, but UWB is missing from the specification.
Applications
With the availability of Bluetooth version 3.0 HS, you can expect to move large data files of videos, music and photos between your own devices and the trusted devices of others, without the need for cables and wires. Some applications you will experience include:
-Wirelessly bulk synchronize music libraries between PC and music player or phone
-Bulk download photos to a printer or PC
-Send video files from camera or phone to computer or television
Technical Specifications
This new specification release includes several major enhancements:
-Generic Alternate MAC/PHY (AMP)
-802.11 Protocol Adaptation Layer (PAL)
-Generic Test Methodology
-Enhanced Power Control
-Unicast Connectionless Data
It will take 6 months to a year before devices start shipping with the new B/T 3.0 HS and even longer before us consumers replace our older 2.0 and 2.1 B/T devices.
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Cirago Micro USB Bluetooth 3.0 Adapter Class 2The Cirago Micro USB Bluetooth adapter comes with full Bluetooth 3.0 functionality in a size that is barely larger than a USB port itself. It unlocks the benefits of Bluetooth for any computer with an available USB port: transfer files and structured data such as electronic business cards or calendar entries to smartphones and PDAs, connect to Bluetooth keyboards, mice, printers or headsets with a range of up to 33 feet.
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Click here for more information about Cirago Micro USB Bluetooth 3.0 Adapter Class 2
