By default all Viiiiva units advertise the same Bluetooth name "Viiiiva", but you can change your Viiiiva's name to a custom name using the 4iiii app. Follow the instructions in Section 5 of the User Guide. If you haven't changed your Viiiiva name and are having trouble identifying your Viiiiva in a group, the best strategy is to connect using Tap-to-Pair. Follow the instructions in Section 3 of the User Guide.