Movement : High quality tourmaline energy movement, polymer lithium battery 120mAh (30 days for low load life, 7 days for typical use)Features: Call SMS display, social reminder, calories, exercise distance, heart rate sleep monitoring, Emfs energy core to promote blood circulation and improve sleepMaterial : 6030 aviation aluminum shell buckle, OLED display, anti-allergy silicone energy strapColor: blue, black, purple