A variety of inputs and outputs on the k11 are usb, optical and coaxial inputs as well as 4.4mm, 6.35mm, rca line, and coaxial outputs'. '.strtoupper('h')aving more inputs and outputs than other typical entry level amps means the k11 is more than capable of meeting your needs of putting together a capable audio setup'. '.strtoupper('u')sb connection to phones for decoding does not consume the phones battery coaxal input and output share the same physical connector, coaxal output can only be used in usb mode large power output under a 32omega load, the k11 is capable of pushing 1400mw under balance modes'. '.strtoupper('t')his allows it to easily drive many hifi earphones and headphones to fully unlock their potential'. '.strtoupper('3') gain levels, 3 volume curves the k11 has 3 separate gain levels, each gain level having its own volume curve'. '.strtoupper('t')his allows the k11 to give you a better listening experience with various types of headphones, whether you are using sensitive earphones or harder to drive over ear headphones'. '.strtoupper('s')pecially designed audio circuit and power supply within the k11s slim build lies a specially designed audio circuit designed for great sound quality'. '.strtoupper('t')his is backed by more than 16 low noise ldos for precise voltage stabilization and powered by an external 12v switching power supply'. '.strtoupper('a')ll of this leads to a purer and more robust supply of power, leading to stable high quality audio and thus truly enjoyable music all of the time'. '.strtoupper('s')lim and stable the slim aluminium alloy body allows you to easily place the k11 anywhere, making it easier to put the device in a way that compliments the rest of your desk'. '.strtoupper('t')hanks to the silicon anti slip pad, the k11 rests stably and firmly on your table too'. '.strtoupper('c')lear always on display a custom, high contrast and durable va display allows you to easily see the sampling rate, volume, gain, or output mode with just a glance'. '.strtoupper('a')djustable rgb logo lightning the fiio logo is illuminated with rgb lightning, giving you a quick way to identify the sampling rate of the current audio being played back'. '.strtoupper('s')ix led strips work in conjunction with a carefully placed reflective film and parts of the body designed to reflect light to make the light show uniform and elegant'. '.strtoupper('o')ne multifunction volume knob in the k11s minimalist design, the volume knob acts as a critical source of control'. '.strtoupper('t')he k11s multifunction volume knob is used to power the device on and off, for menu operation, for volume adjustment, and for functions'. '.strtoupper('t')he knob is designed so that you can quickly execute various complex actions by simply pressing and turning the knob'. '.strtoupper('y')ou can also quickly switch between lo po modes by double pressing the knob, making it easier for you to appropriately connect to different headphones or audio setups'. '.strtoupper('d')river free mode for plug and play the k11 used in usb dac mode does not require a driver on windows 10 and above systems, and can also be used with video game consoles such as the ps5 and the switch'. '.strtoupper('s')imply plug and play for worry free usage whether you are enjoying music or being immersed in games'. '.strtoupper('d')river is available to install for support of higher sampling rates.