Main Features: -Small simple compact design but practical and powerful, exclusively designed for the customers who pursue HiFi sound; Ship with power adapter and power cord, no sparks flying when power cord plug in. -Adopt Texas Instruments TPA3116D2 chip to get clear audio sound, stopped playing when switch on or off, no audible noise, dead silent when nothing is playing through it. Two 50W(4 ohms, 20Hz-20kHz, 0.04% THD) can drive 2ohm-8ohm 20-320Watt speakers and 10-300Ohm headphones. -With headphone amplifier output, The speakers output will interrupt when headphones plugged in. Works with (MP3, CD, TV, PC, Echo Dot, Android, Smartphones,Tablets, Turntable,etc.), best for (Bookshelf/ Computer/ Desktop/ Theater audio system). -Advanced circuitry design, built-in speakers protection circuit, solid aluminum chassis for long time use, small size, good looks, simple functionality, and excellent sound quality. -Aluminum shell to sure high quality, Manufacturer-Direct, free lifetime technical support, it is more durable. Specification THD:≤0.04%; SNR:≥98dB; Input Sensitivity:≤280mV; Voltage:AC 110 - 240V; Power Supply:19V 4.74A 90W; Output Power:50W x 2; Frequency Range:20Hz-20kHz(±1dB); Terminating Impedance:2ohm-8ohm; Input Mode:Analog RCA; Headphone Ouput:16-300ohm; Dimension: Product Weight:0.65kg; Product Size: 12.00 x 10.00 x 3.50 / 4.72 x 3.93 x 1.37 inches. Package Contents: 1 x Amplifier, 1 x Headpone Plug Adapter, 1 x Power Cord, 1 x Manual, 1 x EU Plug(We will send you an adapter which according to your country)