Note: Please allow some error due to manual measurement. Specification: Item Type: 4 In 1 Out Switch Amplifier_x000D_Material: Aluminum Alloy_x000D_Voltage: 100-240V_x000D_Remote Control Battery Specifications: 2 x AAA Batteries (Not Included)_x000D_Control Mode: Multifunction Knob, Remote Control_x000D_Number Of Switching Channels: 4 Channel Input Signal_x000D_Number Of Channels: Stereo 2.0 Signal_x000D_Size: Approx. 128 x 190 x 60mm / 5.04 x 7.48 x 2.36in Features: 1STANDARD HIFI OUTPUT: HiFi amplifier supports pure sound volume adjustment, standard HiFi output, full lossless and no sound coloring. ?96?0db balance potentiometer mode. 2FULLY DISTORTION FREE: 0db for 4 into the switch mode volume to 0, the original state of the input signal, all without distortion, switch the 4 channel input signal. 30?315DB PREAMP MODE: More than 0db automatically start the amplifier circuit. Maximum 31.5db can get to 10 times amplification, can be directly connected to the post amplifier to do pre stage use. 4STC HIGH SPEED MASTER CONTROL CPU: 4 in 1 out switch amplifier adopts STC high speed main control CPU, input channels and volume data are saved instantly, and the memory function is restarted. 5INDEPENDENT ST REGULATOR: Multi channel input stereo amplifier uses an on board 3 way independent ST regulator for independent isolation to eliminate interference and crosstalk noise. PackageList: 1 x_x000D__x000D_4in1OutSwitchAmplifier 1 x Instruction Manual 1 x Adaptor 1 x Remote Control 1 x Power Cord