1. The telephone can be integrated with a programmed exchange and a coupler to form an independent communication system.

2. Directly connects to the telecommunications network.

3. After the communication system is assembled, each telephone is an independent workstation, and a failure in one does not affect the entire system's operation.

4. After assembling the communication system, the product features automatic gain, ensuring the volume of the voice remains consistent regardless of the distance or number of telephones in use.

5. The internal circuit of the telephone utilizes a universal double-sided integrated circuit, featuring accurate dialing, clear communication, and stable operation.

6. Carbon steel surface with electrostatic powder coating, high mechanical strength, and strong impact resistance.

7. Our company manufactures the handles, brackets, and keyboards for critical components in-house, ensuring strict quality control and a rapid response to after-sales inquiries.

Applicable to environments with special requirements for moisture-proof, fire-resistant, noise-proof, dust-proof, and frost-proof in subway systems, pipeline tunnels, highways, power plants, gas stations, docks, and steel mills.

Usage Instructions:

1. Initiator presses the button, dials the called party's phone number → the called party's phone rings.

2. Party called hears ringtone → presses button to answer the call, both parties engage in a normal conversation.

3. End the call and press the button to hang up.

1. Under normal use and excluding any human damage, a free one-year warranty is provided.

2. Handles, hooks, and keyboards for our products are all self-manufactured by our company; we provide service parts on-demand.

3. Unified Customer Service Hotline: 400-118-2011.