1. [Dual use USB port] Phone or computer plug and play, can be plugged into the phone, and the built-in mini USB interface is available for connection. (Only Android phones that support OTG function can use it) 2. [Detachable back clip] Can be clipped into pockets or collars or folders or books, etc., easy to carry and disassemble. 3. [One click recording] Easy one click recording, recording when turned on, and saving recording when turned off, the operation is very simple. 4. [Voice controlled recording] Record as soon as there is sound, pause recording when there is no sound, improve efficiency, and save memory space. Intelligent segmented recording, intelligent file naming, and intelligent segmentation function can automatically segment and save recording files according to the recording time, and automatically save them as one file every 5 hours. 5. [Long Range] Can continuously record for 38 hours, with a one month standby time to meet your recording needs. Powerful noise reduction, long-distance recording, high sensitivity microphone, can easily record sound within a range of 60 meters, and record all sounds surrounding the recording pen clearly. 6. [Multiple charging methods] Supports charging while recording, and can be using a USB charger or computer or mobile power supply 7. [Suitable for multiple scenarios] Office meetings, recording and evidence collection, teaching lectures, daily conversation recordings, etc You can also plug in headphones to listen to music in MP3 format. Colour:black Material:ABS Supported memory: 32G Recording format: WAV MP3 function: support Note: Support encryption, encryption is for computer files, not the product itself Package Contents: 1 x Conference learning recorder 1 x Headphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.