High Capacity In Battery And Memory - This recorder device built-in 270mAh battery can continuously record 10 hours. With 32 GB of internal storage, you can save up to 576 hours of recordings.  Built-in Condenser Microphone Recording - Recording distance of 10 meters. Intelligent noise reduction can effectively filter the noise part of the sound source. Multifunction - Support voice-activated mode, automatically stop recording when there is no sound, save memory. One-button recording and saving, easy to operate. It will be played repeatedly at the two time points of A and B. Strong Compatibility - It can connect the computer to transfer files, compatible with Windows98\2000\XP and so on. Available In a Variety Of Scenarios - Made of premium ABS material and matte appearance which is ideal for your business meetings, negotiations, interviews, presentations, conferences, semester classes, presentations, group discussions, etc., accurately record all the details. Specification: Model: Sk-299 Material: ABS Recording Format: MP3 Recording Sampling Bit Rate: 128kbps Memeory: 4GB, 8GB, 16GB, 32GB (Optional) Storage Record Time: 4GB - 72hrs, 8GB - 144hrs, 16GB - 288hrs, 32GB - 576hrs USB Interface: 2.0 Battery: 5V 270MAH Lithium Battery Use Recording Time: 10hrs Bulit-in Mic: Non-directional Condenser Microphone Recording Distance: 10m (indoors) System Support: Windows98\2000\XP etc SNR: ≥ 70dB Operating Temperature: -5℃～40℃ Weight: 33g Size: 9.7 x 3 x 1.3cm/3.8 x 1.2 x 0.5in Package Size: 13.5 x 4.7 x 7.6cm/5.3 x 1.9 x 3in Package Weight: 107g/3.8oz Packing List: 1 x Voice Recorder 1 x USB Cable 1 x Earphone