Learning Office Digital Recording Pen Intelligent Recording MP3 Player External Playback Function Product parameters Machine size: 88mm * 33mm * 12.5mm3.4*1.2*0.49 In Screen size: 28 * 25mm (1.1*0.98 In) Weight: approximately 33g (0.07Ib Supporting systems: W98, 2000, XP, etc Color: Black Operating temperature: -5 ~40 Storage: External memory card USB input rated voltage/power: 5V300MAH-5V500MAH S/N: 70dB External input: 3.5-frequency stereo MICRO universal interface/3.5 audio cable Frequency response: 20Hz to 20KHz Recording sampling bit rate: 128Kbps Fully charged battery recording time: approximately 10 hours Capacity (memory card) Recording time: 4GB (72 hours)/8GB (144 hours)/16GB (288 hours)/32GB (576 hours) Product description: 3.8-inch body+1.1-inch Single color screen A 3.8-inch small machine, combined with lightweight and strong ABS material, is more comfortable to use. Convenient to carry at all times, providing a better recording and playback experience. Front Button Design & Friendly Operating System The key is installed on the front, making the using easier and convenient to operate. The physical buttons can also make you feel retro. Friendly operating system interface, the using is easier and easy to understand. One click recording Press to start recording immediately without delay, then press again to save the recording. Suitable for various scenarios, convenient and fast. Equipped with 2 functions of recording and playing songs The functions of repeated recording and timed recording are conducive for improving your learning efficiency and saving more time. The MP3 function allows you to enjoy your favorite music anytime, anywhere. Expandable memoryThis machine can choose from multiple memory specifications and can also add an external storage card separately to achieve memory upgrades. Let you no longer worry about the issue of service life Package Included: 1*Bluetooth audio 1* Data cable 1* Earphone 1 * Instruction manual