Adjustable AC/DC Power Adapter 3V–12V Universal USB Charger
Adjustable AC/DC Power Adapter 3V–12V Universal USB Charger
Universal Adjustable Power Adapter — One Charger for Almost Every Device
Tired of hunting down a different power adapter for every gadget in your home? This Universal Adjustable AC/DC Power Adapter puts you in control with 7 selectable output voltages (3V, 4.5V, 5V, 6V, 7.5V, 9V, 12V) and a built-in USB port — all in one compact, travel-ready unit. Whether you're powering a router, LED strip, radio, toy, or small appliance, this adapter has you covered. Made in Mainland China.
Why You'll Love It
- 7 Selectable Voltages: Dial in exactly the power your device needs — 3V, 4.5V, 5V, 6V, 7.5V, 9V, or 12V — with a simple voltage selector switch.
- Dual Output (DC + USB): Charge or power two devices simultaneously with the adjustable DC barrel output and a dedicated 5V/2.1A USB port.
- Worldwide Compatibility: AC input of 100–240V, 50/60Hz means this adapter works in virtually any country. Interchangeable EU/US plugs are included (AU/UK available on request).
- 7 DC Connector Tips Included: Fits a wide range of barrel jack sizes — 5.5×2.5mm, 5.5×2.1mm, 4.0×1.7mm, 3.5×1.35mm, 3.0×1.1mm, 2.5×0.7mm, plus a micro LED connector.
- Built to Last: High-grade ABS+PC flame-retardant housing ensures durability and safe operation over years of use.
- Generous 1.2m Cable: Reach your devices easily without being tethered to the outlet.
Technical Specifications
| Rated Power | 30W (Max output ≤37.5W) |
| Input | AC 100–240V, 0.25A, 50/60Hz |
| DC Output Voltages | 3V / 4.5V / 5V / 6V / 7.5V / 9V / 12V (adjustable) |
| USB Output | 5V / 2.1A |
| DC Connectors | 5.5×2.5mm, 5.5×2.1mm, 4.0×1.7mm, 3.5×1.35mm, 3.0×1.1mm, 2.5×0.7mm, Micro LED |
| Cable Length | 1.2m (approx. 3.9 ft) |
| Housing Material | Flame-retardant ABS + PC |
| Plug Types | EU / US (interchangeable) |
| Country of Origin | Mainland China |
What's in the Box
- 1× Adjustable AC/DC Power Adapter
- 7× DC Connector Tips
- 1× Set of Interchangeable Plugs (EU/US)
Important Notes
- Actual color may vary slightly from product images.
- Please confirm your required plug type (EU or US) before ordering.
- Always match the output voltage to your device's rated input before connecting.
For safe use of electrical adapters and power supplies at home, refer to the U.S. Consumer Product Safety Commission — Electrical Safety Guidelines.
Frequently Asked Questions
Q: Can this adjustable power adapter replace multiple separate chargers?
A: Yes! Because it supports 7 selectable DC output voltages (3V–12V) plus a 5V USB port and includes 7 interchangeable DC connector tips, a single unit can replace many single-voltage adapters for routers, radios, LED strips, toys, cameras, and other small electronics.
Q: Is this power adapter safe to use internationally while traveling?
A: Absolutely. The wide AC input range of 100–240V at 50/60Hz makes it compatible with power grids in most countries worldwide. EU and US interchangeable plugs are included, and AU/UK plugs can be requested.
Q: How do I know which voltage to select for my device?
A: Check the label on your device or its original power adapter — it will list the required input voltage (e.g., 9V or 12V). Select the matching voltage on this adapter's selector switch before connecting your device to ensure safe and proper operation.
Q: What DC connector sizes does this universal charger support?
A: It comes with 7 barrel connector tips: 5.5×2.5mm, 5.5×2.1mm, 4.0×1.7mm, 3.5×1.35mm, 3.0×1.1mm, 2.5×0.7mm, and a micro LED connector, covering the most common DC jack sizes found on consumer electronics.