Product Material: metal + glass Size: 85mm*36mm*14mm Memory: 8GB Display: 1.0 inch Recording Mode: Continuous Recording Recording Format: WAV format Recording Current: 0.8mA-12mA Recording Sampling Rate: 8KHz/16KHz/48KHz Recording Bit Rate: WAV (32/128/192/384Kbps) Music Playback Format: MP3, WAV Memory Card Type: Does not support expansion cards Display: Monochrome display Transmission Interface: USB 2.0 Recording Distance: 10 meters-20 meters Power Supply Mode: Built-in lithium battery Battery Capacity: 220MAh Battery Life: 18 hours of recording, 5 hours of playback (connect headphones to listen) Color: black, iron gray, silver Quantity: 1 piece Package Contents: 1*recording pen (with battery) 1. Multifunction: The digital voice recorder offers many functions such as MP3 player, one-click recording, phone recording function, high recording quality, automatic storage, time setting. 2. High-Quality Sound, Easy to Use: This recording microphone has higher sensitivity and you can enjoy better sound quality. Simple recording, saving, and playback with three buttons, easy to use. 3. 8G Memory, Longer Recording Time: The recorder can record up to 560 hours (32kbps recording quality); built-in rechargeable battery; when fully charged, you can continuously record 18 hours of recording and 5 hours of playback (connect headphones). 4. High-Fidelity Recordings: The voice recorder features microphones that record in HQ mode and intelligent dynamic noise reduction, ensuring excellent sound and recording quality with audio recordings within a 360-degree radius. External speakers reproduce your recordings with particularly high fidelity. 5. Wide Application: The voice recorder is ideal for universities, lectures, discussions, interviews, group presentations, and podcasts. It is particularly suitable for school children, students, teachers, professors, businessmen, and other groups.