1. Computer recording
2. High power
3. Portable
4. Power-saving
5. High-quality speaker, very loud, can be heard far away
6. High-quality recording chips, high fidelity, low noise
7. Maximm power:>5 W
8. Distance: >300 meters
9. Degree of distortion:<1%
10. Working voltage: DC6V
11. Recording time: 10 seconds