1、1. Multifunctional two-in-one design: It can be used as a rearview mirror or as a lighting safety light. 2、2. 5 lighting modes: strobe effect, slow flashing, circle, reverse flashing, strong flashing. 3、3. Moisture-proof and durable: can handle the most extreme weather without worrying about the elements. 4、4. Fashion and convenience: rubber switch, soft and comfortable, sticker design, adjustable wrist strap size. 5、5. Purpose: Suitable for occasions such as hiking, camping and mountaineering, travel, night cycling, emergency lighting, etc. Material: plastic, sticker Color: Black Lamp size: 5.5*5*3.2cm Bracelet length: 20cm, adjustable Power supply mode: USB charging Battery capacity: 650mah Charging time: 3-4h Life: about 8h Lighting mode: burst flash, slow flash, circle, counter flash, strong flash Applications: hiking, camping, mountaineering, travel, night cycling, emergency lighting 1 * Bicycle Rearview Mirror Lamp; 1 * USB cable;Satisfaction guarantee: Customers are our top priority. If you find any problem with the product, please contact the seller immediately. We strive to provide satisfactory customer service.