Features: brand new and high quality 40 hours battery life when fully charged. Recharging time: 2 hour by computer usb 2.0 port. Please charge it before using. Having only 1 buttons, this voice recorder can be used by less experienced users. Just push it down to the usb port side , you will see a red led on and then blue led 5 times and off, it is recording now. push it to another side, you have switch off the device. there is no visible led/light during recording. It will automatically start recording when sound is detected and you can record in a way to avoid long hours of silent recordings. The recorder is both PC and for Mac USB 2.0 Compatible, please turn off the recorder before connecting to the computer USB 2.0 . Otherwise you can not connect it successfully. There are 4 types, 4G ,8G ,16G ,32G, choosing the one fit for you. Unique Design and recording while charging. You can choose continuous recording to keep plug it in a power bank device. Specifications: Material: ABS Size: 3.2x6x1.86cm/ 1.26x2.4x0.73 in RAM: 4G/8G/16G/32G Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Voice Recorder ( battery included)