## Common ground
All options refer to devices that connect electronic devices to other systems or peripherals, enabling data transfer, charging, or expanded functionality.
## Options at a glance
**8471.70 – Hard disk docking stations**
- **Defining trait:** Designed specifically for connecting and managing multiple hard drives or SSDs.
- **Typical examples:** Portable multi-drive enclosures with USB/Thunderbolt.
- **Best fit when:** You're working with storage devices like SSDs or HDDs for data transfer or backup.
**8471.80 – Docking station for computers**
- **Defining trait:** General-purpose docking station for laptops or desktops to expand connectivity.
- **Typical examples:** USB-C docks with HDMI, Ethernet, and USB ports.
- **Best fit when:** Expanding a computer’s ports for monitors, storage, or networking.
**8471.90 – Contactless data docking (bicycle computer)**
- **Defining trait:** Uses wireless/RF technology to read/write data from a bicycle computer.
- **Typical examples:** Bike data sync stations using RFID or Bluetooth.
- **Best fit when:** The device reads/writes data from a bicycle’s onboard system without physical contact.
**8504.40 – Rectifier type docking stations**
- **Defining trait:** Uses rectifier circuits (AC-to-DC conversion) as core function.
- **Typical examples:** Power-supply-integrated docks with AC input.
- **Best fit when:** The device’s primary role is power conversion, not data transfer.
**8517.62 – Data signal conversion in wired systems**
- **Defining trait:** Focuses on converting or routing data signals within a wired network.
- **Typical examples:** Signal repeaters or protocol converters in industrial networks.
- **Best fit when:** The device handles signal integrity, format conversion, or network bridging.
**8518.21 – Single-speaker docking stations**
- **Defining trait:** Designed to connect and amplify audio via one speaker.
- **Typical examples:** Simple speaker docks for smartphones or MP3 players.
- **Best fit when:** Audio output is the main purpose, with only one speaker.
**8518.22 – Multi-speaker docking stations**
- **Defining trait:** Supports multiple speakers (e.g., stereo or surround sound).
- **Typical examples:** Home audio docks with left/right speakers.
- **Best fit when:** Stereo or multi-channel audio output is required.
**8525.50 – Navigation device docking station**
- **Defining trait:** Built for vehicle navigation systems with GPS, FM, and amplifier.
- **Typical examples:** Car GPS docks with built-in radio and speaker.
- **Best fit when:** Used in vehicles to integrate navigation with audio and antenna.
**8527.91 – Radio docking station with charging & 2 speakers**
- **Defining trait:** Combines FM radio reception, dual speakers (6W RMS), and device charging.
- **Typical examples:** iPod docks with radio and speaker system.
- **Best fit when:** The product is a multimedia hub with radio and audio output.
**8527.99 – Radio-only docking station**
- **Defining trait:** Contains only a radio tuner, no audio playback or recording.
- **Typical examples:** Standalone radio docks without speakers.
- **Best fit when:** The device is purely for receiving radio signals.
**8536.69 – Dock connector for tablets/PCs**
- **Defining trait:** Uses a proprietary dock connector (e.g., Apple Lightning or USB-C).
- **Typical examples:** Tablet docks with dedicated port for tablet.
- **Best fit when:** Designed for specific devices like tablets using a unique connector.
**8536.90 – Vehicle electronics docking station**
- **Defining trait:** Connects mobile computers to vehicle systems (e.g., car infotainment).
- **Typical examples:** Car-mounted laptop docks with CAN bus integration.
- **Best fit when:** Used in vehicles for integrating mobile devices with car electronics.
**8537.10 – Smartphone docking station (composite machine)**
- **Defining trait:** Functions as a full input/output unit for the smartphone, acting like a computer.
- **Typical examples:** Smart docks that turn a phone into a desktop PC.
- **Best fit when:** The dock enables full smartphone functionality (e.g., keyboard, monitor, internet).
**8543.70 – MHL signal adaptation & card reading**
- **Defining trait:** Specializes in adapting MHL signals and supporting memory cards.
- **Typical examples:** Docks for Android phones with HDMI output and SD card slot.
- **Best fit when:** The device supports MHL or card reading as core features.
**8544.42 – Cable-based hard drive dock**
- **Defining trait:** A cable with connectors and a weighted base for external HDDs.
- **Typical examples:** USB-powered HDD docks with physical support.
- **Best fit when:** The device is a simple, portable cable-and-base solution for external drives.
**9018.19 – Medical diagnostic docking station**
- **Defining trait:** Designed for hospital use with ECG/blood pressure monitoring.
- **Typical examples:** Patient monitor docks in clinical settings.
- **Best fit when:** Used in healthcare for medical device integration.
## Key differences
| HS Code | Core Function | Primary Use Case | Audio Support | Power/Signal Type |
|--------|----------------|------------------|---------------|--------------------|
| 8471.70 | Storage access | SSD/HDD management | No | USB/Thunderbolt |
| 8471.80 | General expansion | Laptop docking | No | USB, HDMI, etc. |
| 8504.40 | Power conversion | AC-to-DC rectification | No | Rectifier-based |
| 8527.91 | Radio + audio | Home multimedia | Yes (2x6W) | Charging included |
## How to choose
- Does it connect and manage hard drives? → 8471.70
- Is it for general computer expansion? → 8471.80
- Does it read data from a bicycle computer wirelessly? → 8471.90
- Is its main function power conversion (AC/DC)? → 8504.40
- Does it convert or route data signals in a wired network? → 8517.62
- Does it output audio via one speaker? → 8518.21
- Does it support multiple speakers? → 8518.22
- Is it for car navigation with GPS and FM? → 8525.50
- Does it include radio reception and charging? → 8527.91
- Is it a radio-only device (no audio)? → 8527.99
- Is it for tablets using a proprietary connector? → 8536.69
- Is it designed to connect to vehicle electronics? → 8536.90
- Does it turn the smartphone into a full computer? → 8537.10
- Does it support MHL or memory cards? → 8543.70
- Is it a simple cable-and-base HDD dock? → 8544.42
- Is it used in hospitals for medical monitoring? → 9018.19
## Overlaps & pitfalls
- Some docks (e.g., 8527.91, 8537.10) may combine radio, audio, and charging—choose based on **main function**.
- 8471.80 and 8537.10 both expand computer functions but differ in scope: general vs. full smartphone emulation.
- If a product has multiple features (e.g., radio + charging + speakers), prioritize the **primary purpose**—do not assume one HS Code fits all