1. DUAL CHANNEL SIGNAL: One input and two simultaneous output, the output can be connected to headphones or amplifiers and other sound equipment, and the volume can be independently adjusted, gain: 3.5DB, input impedance: 100K, output impedance: 16‑600Ω, maximum output power: 32Ω 500mw. 2. EXCELLENT OUTPUT: The unit is equipped with an isolated boost power supply, which converts 5V into plus or minus 9V to provide working voltage for the internal circuits. Although the power supply has been optimized for filtering, it is still recommended to use pure power supply to clear and pleasant sound without interference. 3. EXQUISITE AND PRACTICAL: This stereo sound splitter box is mini in size and exquisite in appearance, and the black shell makes it more stylish and powerful. 4. WIDELY COMPATIBLE: Input: DVD, CD, set top box, MP3, TV, cell phone, computer, tablet, microphone, phono turntable, sound card, guitar, bass, electronic instruments, game console or other 3.5mm devices. Output: speakers, subwoofer, soundbar, reverb, post amplifier, headphones, etc. 5. HIGH PERFORMANCE: Stereo switch box brings no loss, sturdy aluminum housing with strong anti interference and long service life. Item Type: Stereo Sound Amplifier Input and Output: 3.5mm Supply Voltage: DC5V Static Working Current: 100ma Gain: 3.5db Input Impedance: 100K Output Impedance: 16‑600Ω, Maximum Output Power 32Ω/500mw Colour:Black Material:plastic Package Contents: 1 x Stereo Sound Distributor 1 x USB Power Cord Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.