An adjustable regulator is not a good way of dimming an LED, but the ebay item you have found appears to implement it the correct way according to the description, so it should be fine (it uses pulse width modulation [PWM] to implement the brightness level). However, it doesn't state if you can set the current, or what the maximum number of LEDs you can drive in series. Maybe that is configurable, but unfortunately the description doesn't state it.
This type of driver is quite good, but is not wireless (It is dimmed with a 0-10V level): **broken link removed**