Feature: Color: Black, White Waterproof Standard: IP67 Appearance material: Strap: Soft Sensor: Gravity acceleration sensor Battery: 120ma Lithium-ion polymer rechargeable battery Watch Diameter: 40mm Watch Thickness: 6.8mm Display: OLED 64*48 Charge: 5V USB jack, charge by PC USB Watch Band Length:160mm-200mm Support System: IOS7.0 to 9.3 or above, android 4.3 to 6.0 or above Step count, distance, calorie consumption management, time display, event reminders (water, medication, meetings, etc. Custom), call alerts, message alerts, clock display, sedentary reminder, vibration alarm, remote self-timer bell

37.5 USD InStock