Sony NWZ-E353RED - Manual (Page 231)

Output (headphones)
Frequency response
20 to 20,000 Hz (when playing data file, single signal measurement)
FM radio
FM Frequency range
87.5 to 108.0 MHz
IF (FM)
128 kHz
Antenna
Headphone cord antenna
Interface
Headphone: Stereo mini-jack
USB I/F: mini-B
Hi-Speed USB (USB 2.0 compliant)
Operating temperature
5 °C to 35 °C (41 ºF to 95 ºF)
Power source
Built-in rechargeable lithium-ion battery
USB power (from a computer via a USB connector of the player)
Charging time
USB-based charging
Approx. 3 hours (full charge), Approx. 1.5 hours (approx. 80 %)
Battery life (continuous playback)
Actual battery life may vary depending on settings. The estimated battery usage hours shown
below are based on typical usage conditions with “Basic setting of battery life measurement” as
shown in the table below.
Note
Even if the player is turned off for an extended period, a small amount of battery power is
still consumed.
Battery life may vary depending on volume setting, conditions of use, and ambient
temperature.
Music
Playback at MP3 128 kbps
Approx. 50 hours
Playback at WMA 128 kbps Approx. 50 hours
Playback at AAC-LC 128 kbps Approx. 48 hours
Playback at Linear PCM 1,411 kbps Approx. 56 hours
Video
Playback at WMV 384 kbps
Approx. 10 hours
FM radio
Receiving FM broadcasting
Approx. 20 hours
Player settings which affect battery life
231