Main features:Clear stock, last 30 pieces 1. The best design principle that can directly convert sound into electrical energy signals. 2. Founder's multi-stage dynamic noise reduction processing algorithm provides clear audio signal output. 3. The USB interface does not need to be driven, plug and play, and provides lossless digital audio signals for the back end. 4. It can show the characteristics of "reproducing the original sound". 5. It has extremely wide frequency response, fast instantaneous response characteristics, and can receive 360° sound. 6. Has ultra-high sensitivity characteristics. 7. Fast transient response characteristics. 8. It has the characteristics of ultra-low tactile noise (Handling Noise). 9. Using electrophoresis technology and polyethylene materials to ensure safety and environmental protection, with anti-drop and impact-resistant properties. 10. It has the unique advantages of small size and light weight. Performance parameter Monitoring range: 3 meters in radius. Sensitivity: -42dB 0dB=1V/Pa 1KHZ Frequency range: 20~20k HZ Output impedance: 600 ohm unbalanced Pointing characteristics: omnidirectional MIC microphone imported large diaphragm anti-interference omnidirectional microphone output amplitude 2.5Vpp Maximum withstand sound pressure 120dB SPL (1KHz, THD 1%) Operating temperature -20°～ +70° Colour: Black Connection method: Micro-USB male Waterproof function Indoor moisture-proof Comply with the standard, in line with the European Union CE standard, the United States FCC certification