High Power Output and HI-END preamp design：Output power up to 15W at 16Ω and 7.5W at 32Ω，Preamp output function can be used as Hi-End preamp. High, medium and low gain control can be switched：Unbalanced interface：Low -11.8dB， Medium 0dB，High 14.4dB；Balanced interface：Low -5.8dB，Medium 6dB，High 20.4dB. Fully balanced discrete component design, Ultra-high power output, Use of electronic relays to control volume, eliminating channel deviations, Built-in high efficiency and low noise power supply system. Beautiful shining quality aluminum housing，Fully laminated color lPS display using tempered glass, equipped with full-function remote control, good hand feeling, better quality, support full-function remote control. 12 months warranty, you can return the item or replace a new one if you have any problems. S.M.S.L H400 Hi-Res Headphone Amplifier 1000mW x 2 Hi-Fi Audio Fully Balanced 3 Gears Gain Control Hi-End Pre Amplifier High Power Output 15W/16Ω 7.5W/32Ω 4.4mm/Xlr/ 6.35mm (Silver)