Dell DJ DITTY HV04T Owner's Manual page 83

Performance Parameters
Audio quality
Signal-to-noise ratio
Channel separation
Frequency response
Harmonic distortion
Playtime
Battery charging time
Operating temperature
Storage temperature
(specifications based on 32-ohm
load at 1-kHz tone are typical
values)
up to 92 dB
up to 65 dB
24 Hz-20 kHz (headphones)
< 0.1%
up to 14 hours (based on 128 kbps
MP3 songs, continuous playback,
volume 7(maximum 21), EQ off,
using included Dell earphones)
2.5 hrs
0°C/32°F to 40°C/104°F
-10°C/14°F to 45°C/113°F
Appendix
83