The Walkman Keitai W42S (Japanese: ウォークマンケータイ W42S) is a mobile phone terminal manufactured by Sony Ericsson Mobile Communications (now Sony Mobile Communications) for CDMA 1X WIN, a network brand operated by KDDI and Okinawa Cellular Telephone Company under the au brand.
| Brand | au, Walkman |
|---|---|
| Manufacturer | Sony Ericsson Mobile Communications |
First released | June 20, 2006 |
| CDMA2000 1xMC (CDMA 1X WIN) (800 MHz / 2 GHz) | |
| Slider | |
| Colors |
|
| Dimensions | 106 mm × 49 mm × 24 mm (max. 26 mm) |
| Weight | 123 g (4 oz) |
| REX OS | |
| CPU | 225 MHz Qualcomm MSM6550 |
| Storage | Dedicated for LISMO: 1 GB Other data: 38 MB |
| Memory Stick Duo, Memory Stick PRO Duo | |
| Battery | Standby: Approx. 250 hours Talk: Approx. 200 minutes |
| Charging | Approx. 130 minutes |
| Rear camera | 1.25 megapixels CMOS image sensor (fixed focus) |
| Front camera | None |
| Display | 2.2-inch transflective micro-reflective TFT LCD, QVGA (240 × 320 pixels), 262,144 colors |
| Connectivity | CDMA2000 1xEV-DO Rel.0 (CDMA 1X WIN) |
| Data inputs | POBox + Advanced Wnn V2 |
| SAR | SAR value: 1.15 W/kg |
| Other | FM radio, IrDA |
It was developed as the company's first "Walkman Phone" for the Japanese domestic market.[1]
Features
editThe Sony Ericsson Walkman® Keitai featured 1 GB of internal storage dedicated to audio files and a 30-hour continuous playback battery life, which was the longest of any mobile phone at the time.[2]
The device features expandable storage via commercially available Memory Stick PRO Duo cards, supporting capacities up to 4 GB. It is compatible with full-length ringtones and ATRAC3 audio files transferred using the bundled SonicStage CP music management software for PC. Additionally, the device offers a continuous music playback time of up to 30 hours.[3]
The lower section of the device features a "Music Shuttle" controller, which is based on the Walkman Stick design. Holding down the center button launches "Shuttle Player," a dedicated software application that plays music alongside visual effects and customizable interface themes. The shuttle button can be twisted to control fast-forwarding, rewinding, and skipping tracks. Although the device utilizes a slider form factor, its music functions can be fully operated while the handset is closed.[4]
References
edit- ↑ "30時間の音楽再生が可能なウォークマンケータイ「W42S」". k-tai.watch.impress.co.jp. Retrieved 2026-07-09.
- ↑ "KDDI Corporate Information: News Releases > KDDI Unveils 7 Models in New au Line-up". www.kddi.com. Retrieved 2026-07-09.
- ↑ "日本初の"ウォークマンケータイ"はauから登場 「W42S」". ITmedia Mobile (in Japanese). Retrieved 2026-07-09.
- ↑ "au、国内初の「ウォークマンケータイ」を6月発売". av.watch.impress.co.jp. Retrieved 2026-07-09.