Specifications: Product name: Rhinitis phototherapy instrument Product model: XWYL-902A Color: black Material: ABS+PC+Silicone Charging interface: magnetic interface Battery type: lithium battery 501520 Battery capacity: 130mAh Charging time: 2-3 hours Full battery life: 15-20 days. 5 minutes per use, recommended 1-2 times per day Product expiration date: 5 years Product performance: 1. The wavelength of the light source is 630nm, and the tolerance is ±20nm. 2. The beam working time is 5 minutes and the error is ±10%. 3. The irradiation intensity of the phototherapy instrument is 12mW/cm2, and the tolerance is ±3mW/cm2. 4. Irradiation instability St≤10%.