Noise Reduction Design: With a built-in DSP digital noise reduction chip and high-sensitivity microphone, it can restore the original sound for ultra-clear recording without headphones and provide exceptional sound quality One-Button Recording/Saving: It features one-button save and one-button recording, making it easy to use. It has a 0.96-inch HD display screen Multiple Playback Formats: MP3, WAV, OGG, APE, FLAC, ACC-LC Long Working Time: Built-in 350mAh battery, it supports continuous recording for 70 hours Easy to Transfer Recordings: Convenient to transfer the recordings to a computer/mobile phone to playback, delete and rename the recording files Practical Gift: A useful gift for students, professors, teachers, businessmen, and anyone who needs to record usually Wide Application: It's ideal for lectures, meetings, interviews, speeches, class, business, and study Specification: Product weight: 50g Product size: 10.7*22*135cm Battery capacity: 350mAh Recording time: 70 hours Charging time: 2 hours Playback time: 32 hours Internal memory: 4GB Speaker: Built-in Display screen: 0.96-inch screen Recording format: WAV Playback format: MP3/OGG/APE/FLAC/WAV/AAC-LC