Sinilink WiFi USB Remote Controller 3.5–20V 5A 100W Smart Switch

Control Any DC Device from Anywhere with Your Smartphone

The Sinilink WiFi USB Remote Controller puts you in command of your DC-powered devices from anywhere in the world — as long as your phone has an internet connection. Operating across a wide voltage range of 3.5V to 20V and supporting up to 5A / 100W, this compact smart switch is ideal for Arduino projects, smart home automation, 3D printers, LED strips, fans, pumps, and more. Toggle power on or off instantly through the free Sinilink (Xinyilian) app on iOS or Android.

Made in Mainland China.

Key Features

• Wide Voltage Range: Compatible with 3.5V–20V DC systems
• High Power Support: Up to 5A / 100W load capacity
• WiFi App Control: Manage your device remotely via the free Sinilink app (iOS & Android)
• Auto-Reconnect: Restores last saved power state automatically after reconnecting
• LED Indicator Light: Clearly shows current ON/OFF status at a glance
• Arduino Compatible: Perfect for DIY electronics and automation projects
• 2.4GHz WiFi: Connects to standard 2.4GHz WiFi networks (not 5GHz)
• Compact & Lightweight: Easy to integrate into existing setups

Specifications

How to Get the App

• iOS: Search "Sinilink" or "Xinyilian" in the Apple App Store
• Android: Search "Sinilink" on Google Play Store

Important Notes

• This controller requires a stable 2.4GHz WiFi connection at all times for remote operation. It will not function normally if disconnected from the internet.
• If using a power bank for supply, ensure it does not auto-shut off at low current draw.
• If you change your WiFi SSID or password, the device will need to be reset and re-paired.
• A stable, quality router is strongly recommended for best long-term performance.
• Open all permissions in the app for full functionality. Language must be set to English or Chinese.

What's in the Box

• 1× Sinilink WiFi USB Remote Controller

For more information on smart home device safety standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: Does the Sinilink WiFi USB Remote Controller work with 5GHz WiFi networks?

A: No — this controller is designed for 2.4GHz WiFi networks only. If your router broadcasts both 2.4GHz and 5GHz bands, make sure you connect the device to the 2.4GHz band specifically.

Q: Can I control the switch when I'm away from home?

A: Yes! As long as your router is connected to the internet and your smartphone has an active data or WiFi connection, you can toggle the switch on or off from anywhere in the world using the free Sinilink app.

Q: Will the controller remember its last setting after a power outage?

A: Yes. All power state settings are saved, and the controller will automatically restore to its last saved state and reconnect to your WiFi network once power is restored.

Q: Is the Sinilink controller compatible with Arduino projects?

A: Absolutely. The controller works seamlessly with Arduino boards and other DC-powered DIY electronics, making it a popular choice for smart home automation and maker projects operating between 3.5V and 20V.