main features:
1.Handle handset shell using a special PC / ABS plastic; 
2.The surface of handle handset is made of light plane, look beautiful, durable, feel comfortable. 
3.Split structure(made of up-and-down handle handset), sealing, flame retardant. Withstand the percussion is not broken, twisted pull no distortion, no burst at minus 40 degrees. 
4.Metal armoured cord use imported 304 stainless steel, has a strong tensile strength.
5.Built-in high strength tensile steel cables, handle tensile strength ≥250Kg. (Spring wire optional) 
6.Use anti-puncture, hifi transmitter and receiver to ensure the transmission characteristics matching the phone call, in line with requirements of 4.2 GB / T15279-2002's. 
Technical parameters:

Conditions of Use: 
1.Ambient temperature: -30 ~ + 50 ℃ Relative Humidity: 10% ~ 95% 
2.Atmospheric pressure: 80 ~ 110 kPa 
Environmental Noise: ≤60dB 
3.Operating Frequency: 300 ~ 3400 Hz

Transfer characteristics: 
1.Sending loudness rating (SLR): 5 ~ 15 dB 
2.Receiving loudness rating (RLR): - 7 ~ 2 dB 
3.Sidetone masking assessed value (STMR): ≥ 7 dB

Packing information:
Garton size
430*390*380 mm
12.5KG/CTN
25PCS/CTN