watch and mobile phone can not be connected to the same headset. Can only be connected separately. The WATCH with Bluetooth headphones such as TWS can achieve independent music playback, and can accommodate up to about 400 songs. The available memory of the WATCH is about 2GB, calculated at 5M per song, which can accommodate about 400 songs. The WATCH uses dual-mode Bluetooth technology, which can be connected to your phone and Bluetooth headset at the same time