RCA stereo 4 in 1 out Audio input Signal Switcher for multiple sources signal select specialized audio rotary switch No need power supply Do you have multiple sources? (CD, DVD, TV, IPAD, DAC, TAPE, TUNER, mobile phone) Do you have multiple amplifiers? (Tube amplifier, digital power amplifier, headphone amplifier) Are you still feel inconvenient by plugging and un-plugging cables between multiple different devices? Here, this product can help you to solve your troubles, it switch easily, and enjoy the sound quality perfectly. You deserve it! This is a convenient, good quality, compact RCA Splitter Box, with 4-ways audio source input, one output (4 in 1 out) or 1 input 4 output (1 in 4 out). Product Features: (1) Specialized quality audio rotary switch, switch smoothly. (2) Passive product, no neeed power supply. (3) High quality golden plated RCA terminal, not easy been oxidation or fading and get rusty. (4) Solid aluminum box with brushed surface finished, front thinckness 6mm, other plate thickness 3mm, case strong and durable. (5)CNC Solid aluminum knob, looks nice and durable. Instruction: (1) Simple operation, easy to use, no external power required. (2) Connect the output cables of your different home audio equipments to the RCA input on our equipment (on back). Turn the knob on front panel to switch different audio source easily. Specification: Size: 110*130*50mm Weight: 650g