SpecificationsCompatibilityUlla fits on bottles of all sizes, shapes and materialsChargingNoAuto ON/OFFYesDaylight sensorYesProximity sensorYesBattery life6 monthsBattery typeCR2032 coin cellMaterialBPA-Free PolyPropyleneSize4 x 2.5 x 1 cmWeight28 gWorking temp.0°C to +70°CCoreLow power MicrocontrollerHigh precision 3-axis accelerometerAmbient light sensorThermometerIn the boxUlla - Hydration ReminderSilicone mounting bandBattery (pre-installed)User manual