This coupler use to connecting two male ethernet cables together and extend the length of ethernet cable. | This couplers are metallic shielded to prevent electrical interference. Plug and play. | The Ethernet Coupler connection is firm, not easy to fall off, suitable for all kinds of places, note: not waterproof. | 8P8C female ethernet coupler jack is compatible with Cat6/Cat5e/Cat5 network cable. | Network Coupler meets Category 6 performance, TIA/EIA 568-C.2 Verified, FCC, RoHS Compliant.

4(1)-IN-1(4)-OUT Mini 3.5mm Audio selector designed for customers having several audio sources and outputs. | ❶ Select audio input between (IN/OUT)A/B/C/D with 1/4 switch knob and get one output. | ❷ Select audio output between (IN/OUT)A/B/C/D to receive one input. | 4 channel switch knobs, fully isolated independent circuit, make sure that each signal is not affected by the other three channels. | Totally No Noise and No Sound Interference. Plug and play， No power needed， Won't affect sound quality.

2-IN-1-OUT/1-IN-2-OUT 3.5mm Audio selector designed for customers having several audio sources and outputs | Select audio input between 1 and 2 with 1/2 switcher and get one output; | Select audio output between 1 and 2 to receive one input | One key to mute， very useful under special conditions | Plug and play, No power needed， Won't affect sound quality