USB Countdown Timer Cable with Rotary Knob – Inline 5V Switch

Take Control of Your USB Devices Automatically

Meet the compact USB Countdown Timer Cable — a smart inline power switch that puts you in full control of your USB-powered devices. Whether you're managing a desktop fan, aquarium pump, LED grow light, or phone charging schedule, this intuitive timer ensures your devices run exactly as long as you need and no longer. Say goodbye to wasted energy and the hassle of manual switching.

Easy-to-Read LED Display & Rotary Knob Control

The clearly visible digital LED display lets you monitor remaining time at a glance, while the smooth silver rotary adjustment knob makes it effortless to dial in your exact countdown settings. No confusing menus or complicated programming — just turn the knob and go.

Flexible 24-Hour Countdown Range

• Hour adjustments: Set in 1-hour increments for precise long-duration scheduling
• Minute adjustments: Fine-tune in 5-minute increments for shorter sessions
• Total range: Up to 24 hours of automated countdown control

Compact & Versatile Design

The slim black rectangular control body measures approximately 7 cm × 2.7 cm × 1.6 cm, making it virtually invisible on any desktop or shelf. Attached black cables — 15 cm input and 10 cm output — offer flexible placement without cable clutter. The safe 5V USB input/output keeps your low-voltage devices and home environment fully protected.

Perfect For

• Aquarium pumps, bubblers, and UV sterilizers
• Desktop and PC cooling fans
• USB LED grow lights and desk lamps
• Phone and device charging timers (anti-overcharge)
• Small USB-powered decorative or seasonal items

Specifications

Related Products You May Like

• 3-Mode Dimmable LED Night Light Wall Socket with Remote
• 2-Pack E27 Multi-Head Lamp Socket Adapter 3/4/5 Head Ceiling

Learn more: ENERGY STAR product efficiency guidance

Frequently Asked Questions

Q: What devices can I use this USB countdown timer cable with?

A: This USB countdown timer cable is compatible with any USB-powered device operating at 5V, including aquarium pumps, desktop fans, USB LED lights, small decorative items, and phone/device chargers. Simply plug it inline between your USB power source and the device you want to control.

Q: How do I set the countdown time on this USB timer switch?

A: Setting your countdown is straightforward — use the silver rotary adjustment knob on the control body to select your desired time. Hours are set in 1-hour increments and minutes in 5-minute increments, with the digital LED display showing your chosen countdown in real time. No apps or extra tools required.

Q: Does this USB timer automatically cut power when the countdown ends?

A: Yes. Once the countdown reaches zero, the inline USB timer switch automatically cuts power to the connected device. This makes it ideal for preventing device overcharging, managing aquarium equipment schedules, or automatically switching off USB fans and lights after a set period.

Q: How large is the control unit — will it fit on my desk without taking up much space?

A: The compact control body measures approximately 7 cm long, 2.7 cm wide, and 1.6 cm thick — smaller than a standard USB stick adapter. The attached cables (15 cm input, 10 cm output) give you flexible positioning, so it tucks neatly behind monitors, aquarium hoods, or along cable management channels.

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.