What is the power supply requirement?

It operates on safe 24 volts DC and supports 220V AC or 110V AC input.

Can the units be used interchangeably?

Yes, all units are interchangeable and do not require antenna wires.

What customization options are available?

Customization is available from samples and designs, with frequency options depending on the number of floors.

Smart Construction Wireless Video Doorbell Door Phone Intercom

Name: Smart Construction Wireless Video Doorbell Door Phone Intercom
Brand: Shanghai Strong Engineering Construction Co., Ltd.
SKU: 851190345

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

OSHA Recommended Safety: Industry standard for construction elevators, recommended by OSHA for worker safety.

Emergency Alarm Function: Built-in alarm switches on all units for immediate medical attention during emergencies.

Three Frequency Options: Available in 250KHz, 741KHz, or 800KHz to suit different site requirements.

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

Safe 24V DC Operation: Powered by safe 24 volts DC with backup battery supply for the car unit.

Weather Resistant Design: Heavy duty composite Nylon Plastic enclosure operates in extreme weather conditions.

Volume Control System: Electronic volume control with microphone gain adjustment to prevent feedback.

No RF Pollution: No electromagnetic wave pollution; does not require radio frequency application.

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.