This AC/DC adapter can apply to most appliances, which the efficient voltage is from 3V to 12V. This universal adapter output is 3V/4.5V/5V/6V/7.5V/9V/12V Volt 1200mA, input AC100-240V 50-60Hz. You can easily set the voltage by a little key, which included with the adapter. Equipped with 8 adapter plugs, 5.5*2.5mm, 4.8*1.7mm, 4.0*1.7mm, 3.5*1.35mm, 3.0*1.1mm, 2.5*0.7mm, 3.5mm mono, 5.0*2.1mm, the different size will fit for your appliances well and solve your various problems. With safe and multiple function, it's easy to operate, and the adapter is very durable, it's secure to use. Suitable for router speaker scale fan piano keyboard camera LED strip light player clock and more. The 8 adapters in1, which can largely save your space and the one can replace a lot adapters. Attention: DC Plug Polarity: inner Positive(+), outer Negative(-), Polarity is irreversible. SoulBay offer 12-Months Warranty and 30-days retuns&refund.