SK-868 USB disk recorder offers 128Kbps clear and natural voice recording. 110mAh battery supports 15h continuous recording, 8GB built-in memory card supports up to 150h recording. Good mate for interview, lecture and etc recording. Features: USB 2.0 disk recorder, can be hooked to key ring, quite portable 128Kbps for high quality voice recording, clear and natural With built-in 110mAh rechargeable battery offer up to 15h continuous service time. 8GB memory capacity support up to 150h recording. Compatible for Windows 98 and above (XP, Vista, 7 8 10 +), Mac OS 9.0 and higher. Specifications: Model: SK-868 Recording Format: WAV Bits: 128Kbps Memory Capacity: 8GB (Support 150h recording.) Built-in Battery: 3.7V 110mAh (Support up to 15h continuous recording.) OS: Support For Windows 98 and above (XP, Vista, 7 8 10 +), Mac OS 9.0 and Higher. Item Size: 7 * 2 * 0.8cm / 2.8 * 0.8 * 0.3in Item Weight: 12.5g / 0.5oz Package Size: 13.2 * 10 * 1.5cm / 5.2 * 3.9 * 0.6in Package Weight: 26g / 1.0oz Package List: 1 * Recorder 1 * User Manual(English/Chinese) Note: Avoid dropping the recorder to the ground.