Adjustable 24mm silicone strap fits up to 8 inch wrist circumference. Lightweight alloy 40mm square case. Color touchscreen display with customizable watch face. Easy to use app available for iOS and Android. Make and receive calls with built-in speaker. Receive notifications for Facebook, WhatsApp, email, and text. Optical heart rate monitor sleep and activity tracker (steps, calories and distance). Recharge battery with micro-USB cable. Gift box included.