| Port / Feature | Specification | Notes | | :--- | :--- | :--- | | | 2 x USB 2.0 (Type-A) | One on left, one on right. | | Headphone | 1 x 3.5mm mini-jack | Standard audio out. | | Proprietary Video | VGA out (via dongle) + AV out | The VGA dongle is easy to lose. | | Wired Network | RJ45 (via dongle) | Ethernet dongle is often missing in used units. | | Memory Card | SD / Memory Stick Duo slot | Proprietary Sony slot. | | Wireless | 802.11 b/g/n (Wi-Fi 4) | Atheros or Intel card. | | WWAN (3G) | Optional SIM card slot | Some PCG-3J1L models have a SIM slot under the battery. | | Bluetooth | Version 2.1 + EDR | Often disabled by default in BIOS. | | Webcam | 0.3 MP (640x480) | Located above the screen. |

Before diving into the numbers, it is important to understand exactly what the PCG-3J1L is. Sony’s naming conventions can be confusing. "PCG-3J1L" is the chassis code often found on the bottom of the unit or in the BIOS.

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