Features: Brand new, Multiple storage options through a micro SD TF card, USB attachments for easy transfer to a computer, Built-in rechargeable battery, Can be used as a regular pen, Equipped with headphones, user manual, and USB data cable. The stylish black ballpoint pen hides talent, and its clever design means that the pen can accommodate the maximum expansion of a 32GB storage card. Playback formats: MP3, WMA, WAV. Mini recording pens are perfect for salespeople, lawyers, law enforcement officers, mystery shopping, or online entertainment. Highlights: One machine with multiple functions, including recording pens, signature pens, mobile USB drives, MP3 players, and intelligent recording pens that integrate recording and writing. User-friendly one-click operation, Built-in large capacity rechargeable lithium battery, Supports up to 32GB of MicroSD cards. Recording space: Recording time: approximately 15 hours, Play time: approximately 10 hours, Charging time: approximately 2 hours, Recording format: WAV, USB interface: Micro interface. The packaging includes: 1 mini recording pen, 1 earphone, 1 USB cable, 1 x User Manual.