■ normal slide phone can view the time / SMS for the following models 4.8-inch phone. ■ square micro reflective trim， sport safer at night. ■ two-stage arm holes， to follow the arm size adjustment arm band tightness. ■ can house keys or a small amount of change. ■ square micro reflective trim， sport safer at night. ■ strong Velcro， strong adhesion， not falling. ■ using diving grade fabrics， soft high flexibility， shockproof， breathable， washable. ■ headphone output line from the top of the pierced hole， so you can also listen to music during exercise.