Specifications: 1. Name: MMCX/0.78 Earphone Pin Adapter 2. Material: 4 Gold Plated Phosphorous Copper 3. Input: 2 Pin 0.78/MMCX(flat /short step/grooved) 4. Output: 2 Pin 0.78(grooved) 5. Color: Transparent Functions: Bluetooth Earphone Cable Transfer: some bluetooth earphone cables do not have 0.78 groove pins,you can use this adapter to convert 0.78 flat pins to 0.78 groove pins. Wired Earphone Cable Transfer:The 0.78 flat pin can be converted into a more versatile 0.78 grooved pin through this product,so as to fit more earphone sockets. Earphone Socket Protection:use this adapter to be fixed on the earphone socket,instead of the earphone cable pin being in direct contact with the earphone socket,prolonging the service life of the earphone socket effectively. Color: transparent Material: ABS Package Contents: 1 pair of 0.78mm 2pin headphone jack adapter 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.