.Independent volume control for each channel 1 with 6.3 Toman mm stereo jack Input input impedance 100 ohm 4 with 6.3 mm stereo plug Output output impedance 80 ohms Dimensions (WxHxD): 103 x 46.5 x 57.2 mm Includes 12 Volt Power Supply MICROAMP HA400 Ultra-Compact 4-Way Stereo Headphone Amplifier 4-channel stereo headphone amplifier for all models of headphones 4 high-power stereo amplifiers Get the best sound quality even at high volume Output power available on each channel Ultra-low-noise 4580 operational amplifier ensures better sound 12V DC Power Adapter
