A-rival Teasi Core Guide De Démarrage Rapide page 22

The data fields in the bike computer can be customized in the
Tahuna App. The customized data fields will also be used if the
App is not connected to the Teasi Core.
b) App working mode:
Teasi Core is only a display equipment that needs to pair and
connect to App, and all its data is from App push; in this mode,
speed/cadence sensor and heart rate monitor shall pair with App
and connect to it.
Please note: No matter which working mode is in, bike computer or
App mode, it is needed to set wheel size on bike computer or App;
otherwise, the data will not be accurate.
Language: Teasi Core supports 5 languages: English, German,
French, Dutch and Czech
Sound: only steering notification tone and warning tone can be turn
off, button tone cannot be set off
Backlight: users can select auto backlight control in settings menu;
when auto backlight is selected, the backlight will be turned off
automatically at day and be turned on at night
Clear pair info: eliminate Bluetooth pairing information
Clear sport data: eliminate all sports data except for ODO data
Reset to default: ODO data will be cleared after resetting to default