Can the volume be adjusted on the units?

Yes, the units feature electronic volume control and a squelch function for convenient adjustment.

What are the power supply requirements?

The system operates on 220V AC or 110V AC, with the Car unit powered by safe 24 volts DC and a backup battery.

Is customization available for this product?

Yes, customization options are available from samples and designs.

Wireless Safe Smart Construction 3 Frequencies Intercom and Remotely Video WiFi Doorbell

Name: Wireless Safe Smart Construction 3 Frequencies Intercom and Remotely Video WiFi Doorbell
Brand: Shanghai Strong Engineering Construction Co., Ltd.
SKU: 851191615

Shanghai, ChinaShanghai Strong Engineering Construction Co., Ltd.

US$198.00-228.00

1 Piece

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Usage

Telephone

Type

Wired

Model NO.

IS-3F (Intercom system 3 frequency)

Information content

Voice

Certification

CE, ISO

Condition

New

Frequency

3 Kinds

Quantity

Depends on Floors

Transport Package

Carton Box

Specification

the phone is 200*120*50mm

Trademark

STRONG

Origin

Shanghai

HS Code

84313900

Production Capacity

30000 Pieces/Year

Key features

Three Frequency Options: Supports 250KHz, 741KHz, and 800KHz for interference-free communication.

OSHA Recommended: Industry standard for construction and temporary hoists in USA, Canada, and Australia.

Emergency Alarm Function: Dedicated alarm switches on all units for immediate worker assistance.

Safe 24V DC Operation: Powered by low voltage with backup battery for reliability in extreme weather.

Durable Nylon Enclosure: Heavy-duty composite nylon plastic construction for long-lasting performance.

No Antenna Required: Utilizes protection loop line for stable signal without external antennas.

Volume Control: Electronic volume adjustment with squelch function to manage feedback.

Customization Available: Customization from samples and designs offered for specific project needs.

Company profile

Importers and ExportersYears of Export ExperienceSelf-brandedExhibition Experience

Shanghai Strong Engineering Construction Co., Ltd.

Shanghai, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs CertifiedExport Year: 10 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤18h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryShanghai Strong Engineering Construction Co., Ltd. is a China-based trading company established in 2014, focused on lift accessories and related construction machinery, mechanical, electrical, and hardware products. The supplier reports five employees, overseas service limitations, no overseas warehouse, showroom, agent, or branch, and participation in bauma China. It offers customization from samples and designs but does not provide private mold development, 3D software design, ODM, OEM for popular brands, or SDK support. Product information indicates new products were developed during the past year. Service procedures and corrective-action records are documented, although the approved supplier list lacks signatures or dates. Audit information identifies TÜV Rheinland, but the evaluation result is recorded as 0 and the stated report validity ended on 2025-08-12. Production capacity, financial credibility, and customer case evidence remain insufficient for firm conclusions.

Supplier typeThe supplier is identified consistently as a trading company and limited company, with no larger-company group affiliation. Its stated scope covers lift accessories and a broad range of construction machinery, mechanical, electrical, metal, hardware, rubber and plastic, and automobile-related products.

After-Sales capabilityThe supplier reports written procedures and records for service-capability assessment, a corrective and preventive action mechanism, and ten qualified service-capability suppliers. It lacks overseas warehouses, showrooms, agents, and branches, although it has participated in bauma China and reports lead times within 15 workdays.

R&D capabilityThe supplier reports having launched new products during the past year, indicating some product-development activity. However, it does not offer ODM, private mold development, professional technical-supplier R&D, 3D software design, or SDK support.

Customization capabilityThe supplier explicitly offers customization from samples and designs. However, it does not provide private mold development or 3D software design services, so customization appears available in defined forms rather than as a full design-and-development service.

Product Q&A

Q:What frequencies are available for this intercom system?

Three frequencies are available: 250KHz, 741KHz, or 800KHz.

Q:Is this product suitable for construction elevators?

Yes, it is specifically designed for industrial elevators and construction hoists and is recommended by OSHA.

Q:What causes communication failure in this system?

Communication failure can be caused by the protective ground wire being grounded in the middle ground, poor connections, or interference from electric motors.

Q:Does the system require an antenna wire?

No, the system does not require an antenna wire as it uses a protection loop line for signal transmission.

Q:What is the effective range of the intercom?

The effective range is more than 300 meters, provided the conductor loop resistance is less than 600 ohms.