Sony WALKMAN NW-WM1A Help Manual page 124

Frequency response
Frequency 20 Hz to 40,000 Hz
(when playing data file, single signal measurement)
General
Power Source
Charging Time
Operating temperature
Dimensions (Walkman)
Mass (Walkman)
Dimensions (Leather case)
(NW-WM1Z only)
Capacity
NW-WM1Z 256 GB
NW-WM1A 128 GB
Actual available memory for other contents (*1)
NW-WM1Z Approx. 230.60 GB=247,612,538,880 byte
Built-in Rechargeable lithium-ion Battery
USB power (from a computer via a USB connector of the player)
USB-based charging
Approx. 7 hours
5°C to 35°C (41 ºF to 95 ºF)
w/h/d, projecting parts not included
Approx. 65.3 mm × 123.4 mm × 19.9 mm
(2.58 inches × 4.86 inches × 0.79 inches)
w/h/d
Approx. 72.9 mm × 124.2 mm × 19.9 mm
(2.87 inches × 4.89 inches × 0.79 inches)
NW-WM1Z
Approx. 455 g (16.1 oz)
NW-WM1A
Approx. 267 g (9.5 oz)
w/h/d, projecting parts not included
Approx. 81 mm × 132 mm × 29 mm
(31.9 inches × 52.0 inches × 11.5 inches)
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