Five satellite systems ensure you're always on the right path.. Bluetooth Calling. Maps & Route Navigation. 5 Satellite positioning (GPS, GLONASS, Galileo, BDS, QZSS). Track 24/7 Health & Fitness Data. Lightweight Design with Aluminum Alloy. Display Resolution: 390x450, with max 550nit. 300mAh capacity big Battery. Sensors: BioTrackerTM 5.0 PPG Biometric sensor (8PD + 2LED). Connection: Bluetooth 5.2.