2ggsm 90018001900mhz gsm85090018001900mhz sim card typeno sim card slot connectivity2g 3g bluetooth40 bluetooth30 bluetooth20 fitness wellnessactivity tracker community share alarm clock find my device stopwatch timer sleep tracker ram128mb typesmartwatch featuresaudio gps camera control message control hands free calls heart rate monitor camera video sensorheart rate sensor accelerometer light sensor supported operation systemandroid ios screen typedisplay techno