Do you have a question about the Creative TravelSound 400 and is the answer not in the manual?
Output power details for the device's channels.
Measurement of audio signal quality relative to noise.
Range of audio frequencies the device can reproduce.
~ 35 hours Alkaline batteries (Total 10mW output).
Instructions for installing four Alkaline "AAA" size batteries.
Details on connecting audio sources via the Line In port.
How to turn the device on and off.
Instructions for increasing the audio volume.
Instructions for decreasing the audio volume.