Intensity of tension>250kg; strong destruction resistancy Good flame retardancy and hand feeling Temperature: -30~+50℃ Relative humidity: ≤95% Atmospheric pressure: 80~110 kPa Ambient noise: ≤60dB Explosion marking: ExdibBT6 Level of protection: IP67 Working frequency: 300~3400 Hz Good call transmission of the matching phone, 4.2-in-GB/T15279-94-compliant Main components: Shell made of PC Armoured cord or coil cord High strength steel rope Pierce-proof and hi-fi transmitter and receiver Connect the permanent seat of the case Magnets or reed in some handsets Customer choice: 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 Package: Carton size: 430*380*390mm G./N.W.: 11.5/10.5KG 20Ft Qty: 438ctn