Sony Walkman NWZ-W273BLK Specifications page 3

MP3 @ 128 kbps = 8 Hrs.
Battery Life
(Approx)
Linear PCM @ 1411 kbps = 7 Hrs.
Power Type Built-in Rechargeable Li-ion Battery
Weights and Measurements
Weight (Approx.) 29g (1.1 oz)
Accessories
Earbuds (Size S/M/L) Supplied in pairs.
USB Cradle (1)
Supplied
Adjustment band (1)
Accessories
Quick Start Guide
Notes on Water Resistant Specifications
1. Actual battery life may vary based on product settings, usage patterns and environmental conditions. Battery capacity decreases over time and use.
2. 1 GB equals 1 billion bytes, a portion of which is used for data management functions.
3. Waterproof certified to the IPX8 standards, submersible up to 2 meters.Salt water is corrosive, do not use in salt water conditions.
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Updated: April 18, 2013