Our Masterbox automatic watch winder can be connected via Bluetooth to our mobile app. When you turn on your Masterbox winder, the Bluetooth activates automatically. To connect your case, prepare your Bluetooth settings page on your phone in advance and then turn on your Masterbox winder.The Bluetooth of your Masterbox remains active for 2 minutes after turning on your watch winder and then automatically turns off after these 2 minutes to preserve the battery life. When the Masterbox name appears under your available devices, click on it to connect.