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Product Information: [Material]: Shell PC [Light source]: 1w high power CoB lamp bead [charging time]: 2 hours [Size]: 85*15*20mm(3.3*0.6*0.8in) [Power]: 1W [Battery]: Built-in500mAh battery [weight] :45g(1.60z) [Luminous flux]: red light 15lm, blue light 10lm [Note]: When the LED is off, press and hold the tact switch 1.5SLED to turn on and short press the gear to switch. if no button is pressed within 5s, the next short press will turn off the LED and memorize the current gear.