Sony Walkman 4-110-117-11 (2) Operation Manual page 161

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Additional Information
Maximum recordable number of photos that can be transferred (Approx.)
Max. 10,000
Recordable number of photos may be less depending on file sizes.
Capacity (User available capacity)*
1
NWZ-S636F/S736F: 4 GB (Approx. 3.46 GB = 3,725,197,312 bytes)
NWZ-S638F/S738F: 8 GB (Approx. 7.19 GB = 7,725,514,752 bytes)
NWZ-S639F/S739F: 16 GB (Approx. 14.6 GB = 15,726,411,776 bytes)
* Available storage capacity of the player may vary.
1
A portion of the memory is used for data management functions.
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
Interface
Headphone: Stereo mini-jack
WM-PORT (multiple connecting terminal): 22 pins
Hi-Speed USB (USB 2.0 compliant)
Operating temperature
5 °C to 35 °C (41 °F to 95 °F)
Power source
 Built-in rechargeable lithium-ion battery
 USB power (from a computer via the supplied USB cable)
Charging time
USB-based charging
Approx. 3 hours (full charge), Approx.1.5 hours (approx. 80 %)
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