5. Atmospheric pressure: 80∼110 kPa
6. Ambient noise: ≤60dB
7. Explosion marking: ExdibBT6
8. Level of protection: IP54
9. Working frequency: 300∼3400 Hz
10. Good call transmission of the matching phone, 4.2-in-GB/T15279-94-compliant
Main components: 1. Shell made of PC 2. Stainless steel flexible tube; 3. High strength steel rope 4. Pierce-proof and hi-fi transmitter and receiver 5. Connect the permanent seat of the case 6. Magnets or reed in some handsets Customer choice: The designs of any hand handle has basic configuration, but still there are some choices Colors of the plastic shell: red, blue and black Shading of the plastic shell: mirror, satin The length of flexible tube (90cm normally) is flexible, the diameter of the tube: φ8.4φ7.8φ6.5 Connector can be chosen according to connector series or designated by customers Sheath can be chosen according to sheath series or designated by customer 
