Features: Professional recording device - Uses professional digital noise reduction with 192Kbps to ensure high-quality and clearer sound experience. Wide range of applications - Free to use this device as a music player, it can also choose loop playback mode. It is a perfect gift for students, professors, teachers, businessmen, writers and bloggers, anyone who loves to record Powerful voice recorder - Built-in 170mAh rechargeable lithium battery with micro USB, convenient to charge and record up to 20 hours after full charge. Convenient to use - Support to listen to the recording content with earphones (included), or you can listen to the computer via USB, besides, you can write with this pen. High quality - Made of superior zinc alloy, noble, scratch-free and durable, perfect for recording lectures, meetings, interviews, speeches, etc. Specification: Model: 022 Size: 14 x 1.28 cm Weight: 30 g Recording format: WAV Music format: MP3, WAV, WMA Frequency: 20-20 KHZ Recording time: About 384 hours (32GB) Battery: 170mAh lithium battery Working time: 20 hours Charging time: About 1 hour Microphone: Omnidirectional microphone Recording distance: 8-10 m/26.2-32.8 ft Operating temperature: -10°- 40° Package size: 18 x 9 x 3.3 cm/7 x 3.5 x 1.2 in Package weight: 110 g/3.8 oz Packing list: 1 x Recording device (without TF card) 1 x Earphone 1 x USB cable 1 x 3.5mm jack - USB adapter