S4 Professional Voice Recorder Voice Control Recording High-definition Long-distance Noise Reduction $ 18.43 Product Information: Recording mode: ADPCM recording 192Kbit, optional voice control recording 50DB Recording format: MP3, WAV Recording time: 2400 (minutes) Maximum number of recording files: 9 Memory card type: does not support expansion cards Display: OLED screen Transmission interface: Headphone 3.5 Number of microphones: two-way Recording distance: 5m Video: Does not support video shooting Battery: Lithium battery Shell material: ABS
