Product information: Screen size: 1.3 inches Interface: USB 2.0 Fuselage memory: 512k + 64K (RAM) Screen material: Glass Wearing method: Wristband Compatible system: Fully compatible Communication function: Support Menu language: Multi language Additional features: Social Entertainment Wireless distance: 5M and below Battery capacity: 280 Mah Operation mode: Touch type + button type Product size: 48 mm * 56 mm * 14 mm Screen resolution: 240 * 240 Silicone wristband: Material Product weight: 120 (g) Packing list: Main body, charging line, instruction manual, color box Version type: Asia Pacific Strap style: Classic button Strap size: M / L (suitable for 150-200 mm wrist circumference) Function: Bluetooth call Color: black, power silver