Feature: 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 a premium pure power supply to ensure 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. Specification: Item Type: Stereo Sound Amplifier Product Material: Aluminum Alloy Color: Black 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 Size: Approx. 6.5x5.5x2.5cm / 2.6x2.2x1.0in . Package List: 1 x Stereo Sound Distributor1 x USB Power Cord Note: All data are measured manually, and there are certain errors in the measurement results.