garmin forerunner 235 Marathon ride heart rate monitoring smart Watch

SPECIFICATIONSBrand Name: GarminGarmin Model: 235Category: Smart WatchesSystem: NoneFunction: PassometerFunction: sleep trackerFunction: Message ReminderFunction: Push MessageFunction: 24 hour instructionFunction: ChronographFunction: Alarm ClockFunction: Speed MeasurementFunction: Heart Rate TrackerRAM: <128MBSIM Card Available: NoType: On WristVoice assistant built-in: noLanguage: EnglishNetwork Mode: NoneMetrics measured: Heart Rate MonitorMetrics measured: OtherMetrics measured: Sleep MonitorBluetooth-compatible Version: 4.0GPS: YesMultiple Dials: YesBattery Capacity: 120-180mAhMechanism: YesOrigin: Mainland ChinaCompatibility: All CompatibleROM: <128MBRear Camera: NoneActivity Tracked: OtherActivity Tracked: Steps TrackerActivity Tracked: Calorie TrackerActivity Tracked: Activity TrackerWaterproof Grade: Life WaterproofBand Material: Silica gelTouch Screen: noBattery Detachable: NoAccessories: cableWi-fi: noScreen Shape: RoundResolution: 215*180Screen Material: LEDWeight[g]: