Specifications Voltage: DC 3.7V Light Source: LED LED Quantity: 148 PCS Wavelength: 660nm Red Light + 850nm Near Infrared Light Pulse Frequency: 10Hz Brightness Levels: 20% / 50% / 100% Timer: 10 Minutes Battery Capacity: 3000mAh Charging Time: Approx. 4 Hours Working Time: Up to 1.5 Hours Unit Dimensions: 11.8" × 7.9" × 4.7" (30 × 20 × 12 cm) Net Weight: 0.69 lbs (315 g) LED Lifespan: Up to 50,000 Hours Operating Temperature: -4°F to 104°F (-20°C to 40°C) Warranty: 36 months Logo Customization: Support