Both Bip 3 models pack 1.69″ TFT touchscreens with 240×280 px resolution. They are outfitted with BioTracker 2 PPG biometric sensors and support heart rate, blood-oxygen saturation and stress level tracking. You also get activity tracking for over 60 sports modes. The batteries on both wearables come out to 280 mAh and are rated at up to 14 days of typical usage. Battery life on the Pro model will presumably take a hit with GPS usage. Both watches are 5ATM waterproof and connect via the Zepp app to any Android 7.0+ iOS 12.0+ device.