HUAWEI Watch GT Classic Edition smart watch has 1.39-inch AMOLED colour screen. 22 hours Continuous exercise tracking , heart rate monitoring and GPS on; Resolution: 454 x 454, PPI 326 Sustaining battery life, lasts for up to 2 weeks without charge; Internal ROM 128 MB, internal RAM 16 MB.24/7 continuous heart rate monitoring, supports resting heart rate.