Specifications
Display
| Size/Resolution | 3.1-inch (7.8 cm), WVGA (800 × 480 Pixels) |
| Panel type | TFT color display with white LED-backlight |
| Touch panel | Supported |
Interface
| USB | Hi-Speed USB (USB 2.0 compliant) |
| Headphone | Stereo Mini-jack |
| WM-PORT | WM-PORT (multiple connecting terminal): 22 pins |
| External memory | microSD, microSDHC, microSDXC |
FM radio (Except for the NW-A55L)
| FM Frequency range | 87.5 MHz to 108.0 MHz |
| Antenna | Headphone cord antenna |
Bluetooth
| Version | Communication system: Bluetooth Specification Version 4.2 |
| Frequency band | 2.4 GHz band (2.4000 GHz - 2.4835 GHz) |
| Modulation method | FHSS |
| Supported Bluetooth profiles | A2DP, AVRCP |
| Supported Codecs (Transmission) | SBC, LDAC, aptX, aptX HD |
| Supported Codecs (Reception) | SBC, LDAC, AAC |
NFC
| NFC | Active type (for reader and writer),Tag Type |
Headphone Out (Stereo Mini-jack)
| Frequency response | 20 Hz to 40,000 Hz |
Noise Canceling system
| Digital Noise Canceling (Select Environment) |
Full-auto AINC Bus/Train Airplane Office |
Ambient Sound Mode
| Ambient Sound Mode | Supported |
General
| Power Source | Built-in battery: Built-in Rechargeable lithium-ion Battery |
| Charging and Power supply: USB power (from a computer via a USB) |
|
| Charging Time | USB-based charging Approx. 4 hours |
| Operating temperature | 5 °C to 35 °C (41 ºF to 95 ºF) |
| Dimensions | w/h/d, projecting parts not included Approx. 54.8 mm × 97.3 mm × 10.7 mm (2.16 inches × 3.84 inches × 0.43 inches) |
| w/h/d Approx. 55.7 mm × 97.3 mm × 10.8 mm (2.20 inches × 3.84 inches × 0.43 inches) |
|
| Mass | Approx. 99 g (3.50 oz) |
Capacity
| NW-A55 | 16 GB |
| NW-A55HN | 16 GB |
| NW-A55L | 16 GB |
| NW-A56 | 32 GB |
| NW-A56HN | 32 GB |
| NW-A57 | 64 GB |
Actual available memory for other contents
| NW-A55 | Approx. 12.26 GB=13,164,150,784 byte |
| NW-A55HN | Approx. 12.26 GB=13,164,150,784 byte |
| NW-A55L | Approx. 12.26 GB=13,164,150,784 byte |
| NW-A56 | Approx. 26.81 GB=28,794,585,088 byte |
| NW-A56HN | Approx. 26.81 GB=28,794,585,088 byte |
| NW-A57 | Approx. 55.93 GB=60,055,519,232 byte |
Note
- Available capacity may vary. A portion of the memory is used for data management functions.
The contents of the Help Guide may be subject to change without notice due to updates to the product's specifications.

