Security level upgradedSay goodbye to the usual sports reflective vest,this led reflective vest is equipped with 360 degree visibility reflective strip,which can make you visible from 900 feet away. Bright colors are also more alerts.These running lightsgreatly improve the safety of your night workouts. 3 light modes & 8 ledsThis running reflective vest adopts 4 LED lights in the front and in the back, making sure you can have a much brighter environment when you run. The 3 modes are respectively: quick flash, slow flash and continues lighting,you can switch modes according to your preferences.. Breathable and lightweightThis running lights for runners are made of high-quality and skin-friendly breathable materials, weighs 0.31LB, it can be used in any season without adding any burden to your sports. Suitable for running, cycling, dog walking,night safety protection, jogging and other night outdoor activities. One size fits allHigh quality elastic strip equiped with adjustable buckles is adjustable and with good strength, so the running light also wears comfortable. the range of adjustmnets for waist band circumference is 20 - 35.4 inch. Both children and adults can use it, no need to worry about your body shape. Colour:Green Length: 26-37 inch/ 67-94cm Waist circumference: 21.5-37.5 inch/ 55-95cm Material: Elastic reflective band Reflection distance: 985 feet away Button Battery: 2pcs CR2032 + extra 2 batteries Rechargeable Battery: Rechargeable lithium-ion batteries Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 527 hours Hope you have a pleasant shopping experience!