Accu Box S2 is a clean accu power supply and has an incredible synergy with all Phono Boxes. Using Accu Box S2 on any of our recommended products, results in a more homogeneous and spacious sound with better separation and imaging. The sound will come across as more cleaned up overall, giving you a relaxed listening experience with mind numbing sonics. Accu Box S2 uses five cells or rechargeable Li-Pol batteries with a capacity of 2.6Ah. For protection of the batteries Accu Box S2 comes with over-charge, over-discharge and over-current protections, to ensure the maximum life-span of our product. Furthermore Accu Box S2 also offers a 5V USB A output, for other products, such as DACs.Compatible products:S2-Line: Stream Box S2, Stream Box S2 Ultra, BT Box S2, Pre Box S2 Digital, Pre Box S2 Analogue, DAC Box S2 + Head Box S2 Tube Box S2, Head Box S2 Digital, Phono Box S2, Phono Box S2 UltraE-Line: Optical Box E, Phono Phono Box E, Phono Box E BT, Record Box EDS2-Line: Phono Box DS2, Phono Box DS2 USB, Tube Box DS2, DAC Box DS2 ultra, Pre Box DS2 Digital, Head Box DS2 B, Pre Box DS2 AnalogueUK/EU Power supply included: YesBluetooth: NoColour: SilverDepth (cm): 10.6Height (cm): 3.7Outputs: USBPackage Contents: AdapterType: Phono ChargerUSB: YesWeight: 545 gWidth (cm): 10.3Made in: Czech RepublicPower Supply: AdapterOriginal Colour by Producer: Silver