Color: Silvery Screen Ratio (%): 95 Strap Material: Silicone Water Resistance Level: Non - Waterproof Power Mode: USB Charging Body Material: Plastic Operating Voltage: ≤36V Wireless Property: wireless Battery Properties: Rechargeable Battery Rechargeable Battery: Lithium Battery ...Color: Silvery Screen Ratio (%): 95 Strap Material: Silicone Water Resistance Level: Non - Waterproof Power Mode: USB Charging Body Material: Plastic Operating Voltage: ≤36V Wireless Property: wireless Battery Properties: Rechargeable Battery Rechargeable Battery: Lithium Battery-Polymer Brand Applicable Age Group: 18+ Electronics,Smart Devices,Smartwatch&Accessories,Smartwatch Black,Silvery