Strap material: Umbrella rope braided bracelet Material: Umbrella weave General functions: time, umbrella rope, compass, thermometer, infrared, lighting, violet light, karaoke, whistle Size: 23*5.5cm After the umbrella rope is disassembled, it is about 2.2m long. Light battery voltage: 3.7V Capacity: 12.mAH Charging input: DC5V Flashlight power: 0.25W, brightness 28000-30000MCD Violet wavelength: 396-400NM, brightness 200-300MCD Red laser power: 5mW, wavelength 650NM Precautions: 1. It is forbidden to illuminate the glasses to avoid injury. 2. This product is not suitable for people under the age of 18