ZFKJ-KY intelligent digital anti-noise speaker phone 
 Anti-noise speaker phone speaker phone intelligent digital anti-noise speaker phone 

 Main features 
 ZFKJ-KY intelligent digital anti-noise speaker phone (hereinafter referred to as words Station) is supporting the use of switch or scheduling the amplification devices, automatic telephone-free speakerphone function make up the deficiency. The noise reduction technology, then stop and high-fidelity digital amplification technology, has excellent anti-noise amplification, especially for high noise areas such as coal yards, docks, steel mills, power plants, as the public address communications and scheduling alarm communication terminal. 
 Then stop ringing with the PA, PA Radio. The radio call, you can always find the current staff. Low transmission, distributed amplification, can improve the call / distance calls and voice clarity. If the calling user station with duplex calls. 
 Digital anti-noise technology, 115 dB noise, the two sides can still maintain a clear call. 
 Then stop using non-contact design hook, IP65 degree of protection, the use of any site harsh environment. 
 Instructions with a luminous keyboard, easy to use night operations. 
 PA Power has 15W, 30W two specifications. 
 Main technical parameters 
 It is connected with the adaptability of scheduling machines or switch. 
 Subscriber Line DC open circuit voltage: 40V ~ 64V, DC feed subscriber line current: 25 ~ 60mA 
 Ringing voltage: 75 ± 15V, 25Hz ± 3Hz 
 Busy signal: frequency 450Hz ± 20Hz, intermittent ratio (0.3 ~ 0.4) s: (0.3 ~ 0.4) s 
 If station power supply 
 AC: 220V ± 10% 
 Please contact me: 
 QQ: 62 
 The company also operates: couplers, expanding broadcast telephone, industrial anti-noise telephone, cell phone explosion, HDB-2 Explosion-proof telephones, magnet-type telephones, speakers, explosion of connections around the pipe, threading box, low voltage cable connection box , mining intrinsically safe junction box circuits, high voltage cable boxes, cable boxes communication, DSB explosion-proof motor terminal box, terminal, explosion-proof latch, explosion-proof latch switch, high voltage cable connector, explosion-proof electric hoist button, separate type control button, the button switch, explosion proof fire alarm button, the button switches the safety circuits, relays, communication relays, electromagnetic relays, vacuum contactor, magnetic amplifiers, repeaters, sound and light combination of signal devices, RBI device, pull point devices, bells, bells batter, control transformers, high voltage fuses, detonators, pneumatic frame pillar drill, coal drill, bolt rig, rock drill, DTH drilling rigs and other mining machinery .