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Doorbell

A doorbell is a signaling device attached to a door to indicate the presence of visitors. It typically consists of a button or lever, and an audible or visual indicator.

Material

Doorbell components are commonly constructed from the following materials:

• Button: Plastic, metal (brass, stainless steel, chrome)
• Housing: Plastic, metal (brass, stainless steel, aluminum)
• Internal Mechanisms: Copper wiring, electronic components (for electronic doorbells), mechanical components (for traditional doorbells).
• Chime/Speaker: Metal (for chimes), plastic (for speaker housings)

Purpose

The primary purpose of a doorbell is to alert residents to the arrival of visitors without the need for shouting or direct visual contact.

Function

A doorbell functions by completing an electrical circuit when activated. This circuit triggers either:

• Mechanical Chime: A traditional doorbell uses a solenoid to strike a metal chime, producing a ringing sound.
• Electronic Chime/Speaker: An electronic doorbell activates a speaker to play a pre-recorded sound or chime.
• Smart Doorbell: A smart doorbell sends a notification to a smartphone or other device, often including a live video feed.

Usage Scenarios

• Residential Homes: The most common application, used to announce visitors to the homeowner.
• Apartment Buildings: Used to signal visitors to individual units.
• Businesses: Used to alert staff to customers or deliveries.
• Accessibility: Important for individuals with hearing impairments (visual doorbells).

Common Types

• Traditional Mechanical Doorbell: Relies on a physical chime and a solenoid. Requires wiring to a power source and chime unit.
• Wireless Doorbell: Uses radio frequency (RF) signals to communicate between the button and the receiver. Easier installation, often battery-powered.
• Video Doorbell (Smart Doorbell): Connects to a home Wi-Fi network, allowing remote viewing and communication via a smartphone app. Features include motion detection, night vision, and two-way audio. Examples include Ring, Nest Hello, and Arlo.
• Digital Doorbell: Displays a digital image of the visitor on a screen.
• Chime-Only Doorbell: A simplified version that only produces a chime sound without any visual indicators.
• Push Button Doorbell: The most basic type, requiring a physical push to activate.

按铃可归类为以下HS编码：

• 8531801500: 电声或视觉报警装置（例如，铃、警报器、指示牌、盗窃或火灾报警器），不包括第8512或8530章的那些；部件：其他装置：门铃、门铃、蜂鸣器和类似装置。

  • 85: 电气机械设备及其部件。
  • 31: 电声或视觉报警装置。
  • 80: 其他装置。
  • 15: 门铃、门铃、蜂鸣器和类似装置。
  • 关税为基础关税1.3%，加征关税0.0%，2025.4.2后加征关税30.0%，总税率为31.3%。

• 8512300040: 电气照明或报警设备（不包括第8539章的那些），用于自行车或机动车辆的雨刮器、除霜器和除雾器；部件：声报警设备 其他。

  • 85: 电气机械设备及其部件。
  • 12: 电气照明或报警设备。
  • 30: 声报警设备。
  • 00: 其他。
  • 40: 其他。
  • 关税为基础关税2.5%，加征关税25.0%，2025.4.2后加征关税30.0%，总税率为57.5%。

根据提供的参考资料，与“按铃”相关的HS编码选项有限，仅找到以下2个。