Gaqqee W-3301A Miniature Thermostat DC 5–24V LED Timer

Gaqqee W-3301A Miniature Digital Thermostat with Timer – DC 5–24V

Take precise control of your temperature-sensitive projects with the Gaqqee W-3301A Miniature Wired Thermostat. Featuring an easy-to-read LED digital display, dual heating/cooling modes, and a built-in countdown timer, this compact controller is perfect for incubation, fermentation, aquariums, terrariums, small appliances, and DIY temperature automation projects. Simply plug it in via USB and you're ready to go — no complex wiring needed.

Made in Mainland China.

Key Features

• Dual-Mode Temperature Control: Seamlessly switch between heating and cooling modes for fully automatic temperature regulation — no constant manual adjustments required.
• High-Precision NTC Probe: Waterproof sensor delivers accurate real-time temperature readings across a wide range of –20°C to 120°C (–4°F to 248°F).
• Built-In Countdown Timer: Set a timed shut-off of up to 999 minutes with one-touch activation — ideal for incubation, fermentation, heating cycles, and more.
• USB Plug-and-Play: Wide voltage input (DC 5–24V) via USB port means fast, hassle-free setup with no complicated wiring.
• Child Lock Safety Mode: The device automatically activates child lock after 30 seconds of inactivity, preventing accidental setting changes. Easily disable by holding the power button.
• CE & RoHS Certified: Meets international safety and environmental compliance standards.

Technical Specifications

How It Works

The LED display shows the current real-time temperature at all times. In cooling mode, when the measured temperature reaches or exceeds the set target plus the configured differential, a compressor-protection delay countdown begins; once complete, the unit activates the connected cooling device. In heating mode, when the measured temperature drops to or below the set target minus the differential, the heating output is automatically triggered — keeping your environment perfectly stable.

What's in the Box

• W-3301A Thermostat Controller × 1

Perfect For

• Egg incubators & reptile terrariums
• Fermentation chambers & homebrew setups
• Aquarium heater/chiller control
• DIY heating/cooling automation projects
• Seedling propagation mats
• Small appliance temperature management

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Frequently Asked Questions

Q: What power source does the Gaqqee W-3301A thermostat use?

A: The W-3301A operates on a wide DC input voltage range of 5V to 24V and is powered via a standard USB port, making it a true plug-and-play device with no complex wiring setup required.

Q: Can the W-3301A thermostat be used for both heating and cooling applications?

A: Yes! The W-3301A supports dual-mode operation — you can configure it for either heating or cooling mode depending on your application, such as incubation, fermentation, aquarium temperature control, or DIY automation projects.

Q: How does the timer function work on the W-3301A?

A: The built-in countdown timer allows you to set a timed shut-off of anywhere from 1 to 999 minutes. Simply activate timer mode with one touch, and the unit will automatically power off the connected device after the set duration — great for timed heating or cooling cycles.

Q: Is the temperature probe on the W-3301A waterproof?

A: Yes. The NTC probe included with the W-3301A is waterproof, making it suitable for use in humid environments, aquariums, fermentation vessels, and other moisture-prone setups.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.