Wristband LED Night Reflective Reflector Bracelet Luminous Running How to use: Use the to adjust the long light. Fast flashing. Slow flashing. Off Luminous color: red light. yellow light. blue light. green light. orange light. white light. light. Flash armband size: Overall specifications: 35cm in length and 2.5cm in width box specifications: length 3.5cm, width 2.5cm Specifications: length 12cm width 2.5cm Adjustment range: applicable 27cm-31cm Ordinary model: Battery: 2PCS CR2032 button battery drive Luminous time: 60 hours, 2-3 months of normal use; the battery can be replaced by yourself USB charging: It can be used for about 2 hours charging for 20 minutes. Can be recharged repeatedly...long life Manual measurement, the measurement and tape are different, the error is kept at about 2cm Light source details: The LED light emits light, and the entire optical fiber is illuminated through the strap. Bright light guide fiber strip to achieve the function of lighting and. This product is of export quality, passed, ROHS, EN471 certification, effective rain and, when cleaning, the battery can be removed, and the battery can be replaced cleaning and drying. It is suitable for dark environments or night activities and outdoor sports. It is illuminated by bright LED optical fiber, which serves as a and at the same expresses individuality. The stylish design is suitable for use both day and night. Battery: The product itself comes with 2 button batteries (original CR2032), and the measured data can last for 80 hours. The battery can be replaced by itself, and they are available in convenience stores or in the market. Contains: 2pc reflective strip,2pc charging cable