Power supply: 12 V DC, 150 mA
Input impedance: 100 kohms unbal.
Max. input level: +14 dB
Input impedance: 100 kohms
Output impedance: 51 ohms
Gain: 20 dB/channel
T.H.D.: 0.008 %
S/N ratio: >90 dB
Dimensions: 113 x 73 x 40 mm
Weight: 0,34 kg
Frequency range: 20 - 20000 Hz
Height: 4 cm
Depth: 7,3 cm
Power supply: 230 V AC, 50 Hz 12 V DC 150 mA
Width: 11,3 cm
Power connection: Mains Input Socket (M) Coaxial power connector (M) Power supply cord with AC adapter (m) 

4-channel headphone amplifier, 6.3 mm jack
-Distributes the signal of 1 audio source to 4 sets of headphones
-4 channels with separate level controls and headphone outputs
-All connections via 6.3 mm jacks (1/4")
-Operation via supplied power unit
-Power connection: Mains Input Socket (M) Coaxial power connector (M) Power supply cord with AC adapter (m) (provided)