Bulb: service life of 100,000 hoursMaterial: ABS plasticColour: BlackEnergy: 2 CR2032 button batteriesWaterproof grade: IPX5 life waterproofSize: 8.5 x 4 x 0.9 CM2-mode switchingSuitable for various indoor and outdoor purposes.It is also a good gift for family and friends who like outdoor sports.Feature: Just clip the cap clip lamp to the front of the cap, which is very convenient. The clip is very tight, it will not drop the hat when running or jumping, and it can completely free your hands.Purpose: Outdoor hiking, fishing, camping, night walking, night riding, night maintenance, circuit maintenance, lock repair, jewelry appreciation, etc., can easily use this cap clip lamp.Precautions:-The clip is made of ABS plastic, please do not pull it excessively.-Please place the battery correctly according to its positive and negative polarity.If it hurts your eyes, do not look directly into the light.After the lamp has not been used for a period of time, remove the battery.