Elite QUBO POWER MAG SMART B+ prizm polarized QZSS) 15 Hours Connects to Accessory size:Size XL QZSS) 15 Hours Connects to 5 satellite systems at the same time in dual frequency 7 Hours (With Music) Connects to 5 satellite systems at the same time in dual frequency with offline music Daily Use 24 Days Charging Time Less Than 2 Hours Memory Internal Memory 4GB Activity Memory 500 Hours Estimates based on outdoor activities Geo Location Satellite Systems GPS Lens material : Polycarbonate Qubo Power Mag Smart B+ can also be used with other indoor cycling platforms (which usually require paid subscription) It's not the unit that adjusts on the tyre