24H USB Countdown Timer Switch | Digital Auto Shutdown
24H USB Countdown Timer Switch | Digital Auto Shutdown
24-Hour USB Digital Countdown Timer Switch
Take full control of your USB-powered devices with this compact and easy-to-use 24-Hour Digital Countdown Timer Switch. Simply plug it between any USB power source and your device, set your desired countdown, and let it automatically cut power when the time is up — no more forgetting to turn things off. Perfect for home and office use.
Made in Mainland China.
Key Features
- Up to 24-Hour Countdown: Set hours and minutes independently for precise timing up to 24 hours. Hour increments: 1H; Minute increments: 5 MIN.
- Intuitive Digital Display: A clear digital screen shows the remaining countdown time at a glance — no guesswork required.
- Simple Knob Control: Press the knob once to switch between hour and minute adjustment modes; rotate to set the desired value.
- Plug & Play USB Design: Standard USB male-to-female connector — just plug it in between your USB power source and your device. No installation or setup needed.
- 5V Low-Voltage Safety: Operates at 5V for enhanced safety with all standard USB-powered devices.
- Portable & Lightweight: Compact plastic housing makes it easy to carry and use anywhere.
- Auto Power-Off Function: Press and hold the knob for 3 seconds to manually power off at any time.
How to Use
- Set Hours: Press the knob once to enter hour-setting mode, then rotate to select the desired hours.
- Set Minutes: Press the knob again to switch to minute-setting mode, then rotate to select the desired minutes (in 5-minute increments).
- Start the Timer: After setting your time, wait 5 seconds. When the ":" on the display begins flashing, the countdown has started.
- Manual Power Off: Press and hold the knob for 3 seconds to immediately cut power.
Specifications
| Interface | USB Male / Female Connector |
| Voltage | 5V |
| Max Timer Duration | 24 Hours |
| Hour Increment | 1 Hour |
| Minute Increment | 5 Minutes |
| Material | Plastic |
| Battery Required | No |
| Package Contents | 1 or 2 pcs (as selected) |
| Origin | Mainland China |
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Frequently Asked Questions
Q: What devices can I use this USB countdown timer switch with?
A: This USB countdown timer switch works with any device powered by a standard 5V USB connection — including USB fans, LED lights, phone chargers, USB lamps, humidifiers, and other low-voltage USB-powered gadgets. Simply insert it between the USB power source and the device.
Q: How do I start the countdown timer?
A: After setting your desired hours and minutes using the knob, simply wait approximately 5 seconds. Once the colon (":") on the digital display starts flashing, the countdown has begun and the device will automatically shut off when it reaches zero.
Q: Can I stop or cancel the timer early?
A: Yes. To manually power off at any time, simply press and hold the knob for 3 seconds. This will immediately cut power to the connected device.
Q: Does this timer require batteries?
A: No batteries are required. The timer is powered directly through the USB connection, making it completely hassle-free to use.