1. Product size: 6.7x2.5x2.1cm 2. Product weight: 31.5g 3. Small and light, does not take up storage space, easy to carry 4. Multifunctional warning taillight, can be installed on backpacks, bicycles or helmets to increase riding safety 5. Seven light modes, click the switch to switch at will 6. Built-in lithium battery, USB fast charging, easy to use 7. Life-level waterproof design, no fear of rain invasion
