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Our Advantage:1.Professional R&D team, quality, customer service, production management team. 2.Strong product innovation ability, fast product-updated speed and guaranteed delivery.3.35% of the total revenue is used for advertising every year, and the coverage rate of brand advertisement is high.4.Inventory of products is over 10 million. Parameter:Operating Voltage: 3.7VType of battery: lithium batteryBattery size: 80*30*40mmBattery capacity: 880mAHCharging parameters: 5V 1ACharging time: 1-2HOperating hours: 3-4HThe maximum power of the lamp: 2.5WWarm light color temperature: 2800K-3200KWarm light flux: >200LmExpanded size: 220*150mmWeight: 160gService life: 30000H Package:1 product1 pc of usb cable(60cm)