AndroidGo to the Settings of the NYSW App > tap the Pair a New Watch button to pair your second watch.iPhoneGo to the Settings of the NYSW App > tap the Pairing New Watch button to pair your second watch.You can pair a second watch directly on the Bluetooth settings instead of going through the App if the Pairing New Watch button is not available on your iPhone App.Activate the top button of the watch to start a pairing then,Go to Settings > Bluetooth > There is a Bluetooth button on the page, turn off the Bluetooth and then turn it on > when you see NYSW shows up on the OTHER DEVICES > tap the NYSW device > Tap Pairing (or input the pairing code) when prompted to finish the pairing.Remark:1. Turn off the Bluetooth of all your watches to avoid pairing interference before pairing a second watch.2. You should only connect one watch a time after you have paired more than one watch and switch off the rest for a daily wearing. Don’t connect more than one watch at the same time.