Beijing Yinhe Jinyuan Science & Technology Developing Co., Ltd.
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STY series calling system (433.92Mhz)
Wireless Queue Call
Wireless Intercom System
Wireless Doorbells
Wireless Calling System
Wireless Alarm System
Two Way Radio
Talk-Back System
Call System Applications
Queue Management System
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HCM series calling system(433.92mHZ))
CS series calling system
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