Amazfit GTR 4 Brand: Amazfit Used for about a year after purchasing new. There are signs of use and small scratches. Large 1.43-inch AMOLED display Anti-fingerprint coating Over 200 watch faces and mini-games Music storage and calling function, can store up to 270-470 songs Dual-band circularly polarized GPS antenna, 6-satellite positioning Over 150 sports modes Automatically recognizes strength training Interval training templates Voice assistant for sports data 24-hour health management Heart rate monitoring (alerts for high and low heart rate abnormalities) Sleep monitoring (sleep stages and daytime nap monitoring) Stress monitoring (high stress level alerts) Morning update