Specification: Material: Metal Recording format: WAV format Recording power: 8mA-11mA Recording sample rate: 48KHz Recording bit rate: WAV 192kbps Playback format: MP3, WAV, WMA and other formats Headphone jack: MICRO-Mike jack stereo headphone USB interface: MICRO-Mike 5P/DC5V-1A Storage: Support 4GB-128GB memory expansion (not included) Built-in MIC: omnidirectional capacitor MIC Body weight: about 34g (bare metal) Body size: about 66.90mm*23.20mm*10.20mm Battery capacity: 160mAh Battery continuous working time: 16 hours of recording, about 7 hours of headphone playback Product features: professional noise reduction, one-key recording and saving, low-power automatic saving, fast forward and fast rewind, TXT document time setting, OTG function, multi-language support Key words:Keychain Voice Recorder,Digital Voice Recorder,Recording pen,Voice Activated Recorder,Small Audio Recorder,Noise Reduction Voice Recorder,Conference interview recorder,mp3 player,Recording Tools Features: 1.【Compact Voice Recorder】The voice recorder has a compact size of 6.7*2.3*1cm, which can be easily put into a wallet or as a keychain/MP3/USB stick. Made of high quality titanium alloy for high drop resistance and durability. Also, the unique leaf shape and smooth lines look stylish, sophisticated and luxurious, making it an ideal gift for lawyers, journalists, students, friends, etc. 2.【16-hour long battery life and support for 4GB-128GBTF card expansion】 The digital recorder supports 4GB-128GBTF card expansion (not included), which can store larger-capacity recording files. Built-in high-quality 160mAh rechargeable battery, fully charged in about 30 minutes, can record 16 hours continuously and play 7 hours+. It can be charged while recording, and it comes with a low-battery auto-save data protection function. 3.【One key operation and fast forward/rewind button】One key can start or stop/save recording. There are no complicated steps. Fast forward: With the earbuds connected, long press the previous button on the wired remote. Rewind: Long press a button. Perfect for lectures, meetings, note-taking, classes, dictation, job interviews, and more. 4.【DSP Intelligent Noise Reduction & 192Kbps HD Stereo】The professional audio recorder with playback (listen with earplugs on the recorder) can record high-definition sound quality up to 192Kbps, and adopts the latest DSP intelligent noise reduction technology, which can automatically reduce ambient noise by more than 90%. Plus our exclusive omnidirectional stereo microphone to capture farther/lower but clearer stereo HD sound. 5.【OTG Function】With the included Type-C/Micro-USB adapter, you can view/delete files directly on your Android/phone. Packing list: 1* Recorder 1* Headphone cable 1* Data cable 1* Instruction Note: 1.Please allow slight size deviations due to manual measurement,measuring methods and tools. 2.The picture may not reflect the actual color of the item because of different photographing light and display monitor.Thanks for your understanding. 【Compact Voice Recorder】The voice recorder has a compact size of 6.7*2.3*1cm, which can be easily put into a wallet or as a keychain/MP3/USB stick. Made of high quality titanium alloy for high drop resistance and durability. Also, the unique leaf shape and smooth lines look stylish, sophisticated and luxurious, making it an ideal gift for lawyers, journalists, students, friends, etc. 【16-hour long battery life and support for 4GB-128GBTF card expansion】 The digital recorder supports 4GB-128GBTF card expansion (not included), which can store larger-capacity recording files. Built-in high-quality 160mAh rechargeable battery, fully charged in about 30 minutes, can record 16 hours continuously and play 7 hours+. It can be charged while recording, and it comes with a low-battery auto-save data protection function. 【One key operation and fast forward/rewind button】One key can start or stop/save recording. There are no complicated steps. Fast forward: With the earbuds connected, long press the previous button on the wired remote. Rewind: Long press a button. Perfect for lectures, meetings, note-taking, classes, dictation, job interviews, and more. 【DSP Intelligent Noise Reduction & 192Kbps HD Stereo】The professional audio recorder with playback (listen with earplugs on the recorder) can record high-definition sound quality up to 192Kbps, and adopts the latest DSP intelligent noise reduction technology, which can automatically reduce ambient noise by more than 90%. Plus our exclusive omnidirectional stereo microphone to capture farther/lower but clearer stereo HD sound. 【OTG Function】With the included Type-C/Micro-USB adapter, you can view/delete files directly on your Android/phone.