Product description Material: metal + glass Size: 85mm36mm14mm Memory: 8GB Display: 1.0 inches Recording mode: continuous recording Recording format: WAV format Recording power: 0.8mA2mA Recording sampling rate: 8KHz/16KHz/48KHz Recording bit rate: WAV (32/128/192/384Kbps) Music playback format: MP3, WAV Memory card type: not supported Expansion card 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 recording, 5 hours playback (plugged in, listening through headphones) Color: black, iron gray, silver Quantity: 1 piece Package contents: 1*recording pen (with battery) 1. Multifunctional: The digital voice recorder provides MP3 playback, one-click recording, phone recording function, high recording quality, automatic storage, time setting and other functions. 2. HIGH QUALITY SOUND EASY TO USE: This recorder microphone has higher sensitivity, you can enjoy better sound quality. Easily record, save and playback with three keys, easy to use. 3． 8G memory, longer recording time: the recorder can record for up to 560 hours (32kpbs recording quality); built-in rechargeable battery; after fully charged, it can record continuously for 18 hours and play for 5 hours (plug in headphones). 4. High-fidelity recording: The recorder has a high-quality recording microphone and intelligent dynamic noise reduction function, and 360-degree recording ensures excellent sound and recording quality. External speakers reproduce your recordings with exceptionally high fidelity. 5. Wide range of applications: The recorder is perfect for universities, lectures, discussions, interviews, group presentations and podcasts. Especially suitable for primary and secondary school students, students, teachers, professors, business people and other groups.