This high-quality, low-noise power supply adaptor by myVolts has an output of 18V DC and 1.5A max, and centre positive polarity. Tip: 2.5 x 5.5, straight.
It's suitable for any device that has a power requirement matching this specification.
If your device has a current requirement lower than 1.5A that's fine, only the current required by the device is drawn by the device.
So a device that needs, for example, 500mA (or 0.5A) current will be perfectly served by a 1000mA (or 1A) power adaptor.
Specification:
Input:
Input voltage: AC100-240V, 50/60Hz (for worldwide use)
Plug: EU Plug
Output:
Output Voltage: 18V DC
Output Current (Max): 1.5A
Polarity: centre positive
Cable and tip:
Cable length: 1.5 metres
Tip: 2.5 x 5.5, straight
Safety and certs:
CE certified: Yes
RoHS certified: Yes
Energy efficiency: Rated 'Energy Star level VI'