This portable audio mixer is made of , which can withstand long-lasting use. Features the PCB, acrylic, copper and electronic components material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This portable audio mixer allows you to mix input without power supply. Features -Color: Black -Material: PCB, acrylic, copper, electronic components -Size: 8.35X5.40X2.10cm/3.28X2.12X0.83in Voice data: 24dBi - No need for external power supply, just plug in and use. - Stereo mixer has 4 3.5mm inputs and single 3.5mm output, capable of mixing signals from CD players, musical instruments, portable recording equipment, video playback equipment, etc. - Low noise, high sound quality, great configuration, fit for mixer, phone, computer, game console, and etc. - It is simple in design, but very practical in use, which brings great convenience to you. - Simple in structure, easy to use, not easy to deform, you can use it with confidence. Package list: 1 x audio mixer