Main Features‎:‎‎- Made of good quality metal‎,‎ durable to use‎.‎‎- Volume gain knob is well‎-designed and user‎-friendly‎.‎‎- Added with ECHO switch‎,‎ ECHO time and ECHO depth are designed in high‎-end control system to meet all high‎-impedance microphone drive demands‎.‎‎- The 4‎-channel independent amplifying signal output and 2‎-channel PreAmp output can be used as the pre‎-amplifier of high‎-end microphone‎.‎‎- The interface panel reserves microphone interface in 6.5mm and 3.5mm to 6.5mm gold‎-plated converter‎,‎ allowing for the input / output of microphone and loudspeaker box input‎.‎‎- Suitable for all types of impedance earphones‎.‎ Brand‎:‎ LINEP Channels‎:‎ 3 ‎(‎2.1‎)‎ Model Number‎:‎ A908 Special Feature‎:‎ Mini‎,‎Portable‎,‎Wireless 0.276 Package weight‎:‎ 0.315 kg Product Size‎(‎L x W x H‎)‎‎:‎ 10.50 x 5.80 x 4.80 cm / 4.13 x 2.28 x 1.89 inches Package Size‎(‎L x W x H‎)‎‎:‎ 15.00 x 7.00 x 6.00 cm / 5.91 x 2.76 x 2.36 inches Package Contents‎:‎ 1 x LINEP A908 4 Channels Stereo Headphone Loudspeaker Amplifier‎,‎ 1 x Audio Cable‎,‎ 2 x Power Adapter