Touch a few seconds on one of the earphones just above the writing jbl until the led light flashes red blue – Search for the Bluetooth name TWS4 in the Bluetooth settings on the cellphone, click the Bluetooth name TWS4. – Then touch the other earphone until the led lights up, later the left and right earphones will synchronize by themselves (this stage is only done 1 time, then there is no need to do this stage to use the earphones) Available colors – BLACK – WHITE NB: for color selection and size please confirm, if the item is still there we will inform. if not confirmed we will send items randomly. Thank you PT. Jiekai Sukses Makmur accepts Wholesale / Reseller / Dropsiper for offline services HUB: Open: Monday – Saturday (09.00-18.00) night slow response We will continue to serve.