<P> The SoundLink Air uses Apple's AirPlay protocol instead of Bluetooth, and is designed for use with Apple computers and phones . It was introduced in 2013 at a US recommended price of $350 . </P> <P> The only controls on the speaker unit are volume controls, at the side; as with the SoundLink Wireless Music System, a remote control unit is supplied which controls both the speaker and the source . The unit weighs 2.1 kg (4.6 lb), and is powered from a wall - plug adaptor; unlike the other SoundLink systems a rechargeable battery is only available as an optional extra . Reviewers have acknowledged the sound quality and build quality, but commented that competing systems may offer a better experience, and criticised the price of the optional battery and the bulkiness of the wall - plug adaptor . </P> <P> The SoundLink Color was introduced in October 2014 . It is a smaller, lighter device than others in the range, fits in a handbag or a big pocket, and weighs 0.6 kg (1.3 lb). It is made in a range of colours, at a recommended US price of $130 . Synthesised voice prompts aid the user in setting - up the device . Charging is via a micro USB port, allowing the use of a (non-Apple) mobile phone charger . Reviewers have suggested it is aimed at a budget - conscious youth market . Reviews have been positive, praising the sound quality and volume, and its apparent durability, compared to others at its price, but criticised the lack of a microphone and the limited stereo separation resulting from its small size . </P> <P> Unlike the other SoundLink devices, the Wave SoundLink adaptor is not a standalone unit, but is a wireless Bluetooth receiver that connects via a cable to the Bose Wave integrated audio system, allowing music to be relayed to the system from a computer . It was introduced in 2009 at a US recommended price of $150 . The kit consists of the wireless unit and a USB transmitter which plugs into a computer . The adaptor is controlled by the Wave's remote control unit . </P>

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