Product name: Multi-function recording penProduct weight: 35gProduct size: length 146mm round 13.6mmCharging input :5V/0.5ACharging time: 2HBattery capacity: 3.7V/ about 100MARecording distance: 10MMicrophone: all-pointing condenser microphoneSupport large capacity: support 8G-128G/TF card, large storage to meet your needs, you can choose the right memory card configuration according to your own situation. The recorder with built-in rechargeable battery and playback capability supports up to 20 hours of continuous recording and 25 hours of headphone playback. Is a great recording device for lectures, meetings and conversations.Easy to use: Just press the top button and the logger quickly records/saves recordings. The one-click feature ensures you don't miss anything important. This recorder can record while writing and can also be used as an MP3 player. Each recording is time-stamped to make it easy to find your files. Multi-platform compatibility allows you to use our devices on any platform, and you can also listen to your recordings directly on your device using headphones.Professional Voice Devices: Multi-platform compatibility allows you to upload/download/view/play/delete files and Settings on any platform via USB cable. Professional recorder, portable recorder. The digital recorder is made of a strong, lightweight high-grade alloy and covered in a classic glossy black finish.Intelligent digital noise reduction: 10-meter distance recording, for environmental noise, multiple optimization processing, whether it is a classroom or training can prioritize the human voice, get more sound details.Timestamp function: All files are named by date, which is easy to find and ask about, and provides you with an important basis. In order to ensure the accuracy of the time, it is necessary to use the computer to calibrate and update before use. 1. Connect the recorder to the computer with a data cable; 2. Open the "Computer" on the computer desktop, open and find the "Removable disk" open and find the "Settime" folder; 3. Open the "Settime" folder, find USB_UPDATE.exe and open it, the displayed time is the current time of the computer, click the "Update" button to calibrate.