Features: Professional Recording Device - Adopting professional digital noise reduction with 192Kbps for ensuring high-quality and more clear audio experience. Widely Used - Free to use this device as music player, it also can select the loop playing mode. It's a prefect gift for students, professor, teacher, businessman, writer and blogger, anyone who loves to record! Powerful Voice Recorder - Built-in 170mAh rechargeable Lithium battery with micro USB, convenient to recharge and record up to 20h after fully charged. Convenient to Use - Support to listen to the recording content with earplug (including), or you can listen on the computer via USB, furthermore, you can write by this pen. High-quality - Made of superior zinc alloy, noble, scratch-proof and durable, perfect for recording lectures, meetings, interviews, speeches etc. Specification: Model: 022 Size: 14 x 1.28cm Weight: 30g Record Format: WAV Music format: MP3,WAV,WMA Frequency: 20-20 KHZ Recording Time: About 384hrs (32GB) Battery: 170mAh Lithium Battery Working Time: 20hrs Charging Time: About 1 hour Microphone: Omni-directional Microphone Recording Distance: 8-10m/26.2-32.8ft Operating temperature: -10- 40 Package Size: 18 x 9 x 3.3cm/7 x 3.5 x 1.2in Package Weight: 110g/3.8oz Packing List: 1 x Recording Device (Without TF card) 1 x Earphone 1 x USB Cable 1 x 3.5mm jack - USB Adapter