MP3 speaker docks: Compare features & prices Bose SoundDock Portable 

Size hxwxd (cm)
Size, with docking point extended where applicable, hxwxd (cm)

Weight (kg)
Excluding mains adaptor and additional batteries

Compatible with non iPods
Each dock has been specifically designed to work with an iPod. However, the inclusion of a 3.5mm jack means any portable device can be attached.

Charges newer iPods and iPhones
Some older speaker docks will not charge the newest generations of the iPod and iPhone, though they will play them.

Video output
Useful if you want to feed through video content to a larger display, such as your TV.

Aux input
A yes means the dock has a 3.5mm mini jack for connecting any portable audio device.

PC connectivity
Connect to your computer and synchronise the iPod while docked.

Magnetic shielding
Without magnetic shielding the speaker dock could distort the picture of a conventional TV if placed too near.

Power consumption, on (Watts)
Measured at normal listening level

Power consumption, standby (Watts)
The Energy Savings Trust recommends that standby power should not exceed 2 Watts.

Batteries
All the speaker docks we've tested can be powered via the mains. But some versatile models can also run on batteries

Rechargeable batteries
Rechargeable battery powers up when connected to a mains power supply.

Battery running time, h
Battery running time measured at a moderate listening level.

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