4PCS Electronic Accessories: 1 x Adapter & 3 x Speaker TerminalThe current mainstream mobile phone headset plugs are mostly 3.5mm, 4 segment plugs.Although the plug size specifications of all brands are the same, different national standards are not compatible with each other.The role of this adapter is to allow these two different formats to be converted, that is, OMTP headphones can use CTIA standard mobile phones. On the contrary, OMTP standard mobile phones can also be used for CTIA-standard headphones. Can be universally converted.Compatible Brand: OMPT to CTIA or CTIA to OMTPProduct Name: Speaker TerminalsType: Push typePositions: 4Pin Quantity: 4Item Type: AdapterMaterial: Plastic+metalColor: Black, RedDurable, compact, and lightweightensure the best quality of soundsize: Adapter: Connection Type: 3.5mmLength: 4.3cm(Approx.)Speaker Terminal: 69 x 24 x 20 mm / 2.7 inch x 1.0 inch x 0.78 inch (L x W x H)Package Contents:1 x Adapter3 x Speaker TerminalOnly the above package content, other products are not included.Note: Light shooting 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.