This is an updated LED safety lights developed by iThink Space, which available for morning run, evening walking, jogging, strolling, cycling, etc > Upgraded Design : Lexvss upgraded LED Safety Lights are Slim, lightweight, compact, and super bright LED night safety lights with two eye-catching modes of illumination; steady and flashing strobe. Powered by two coin batteries (CR2032), lasting up to 70 hours (steady mode) or 96 hours (strobe light mode). > Upgraded Configuration : Included 5 x extra CR2032 batteries, 4 x velcro straps (2X4.5 inches + 2X17.7 inches for mounting the lights to dog collar, bike ,arm and waist), 2 x mini-screwdrivers for a hassle-free battery replacement process，3 colors ( Red, Blue, Green) LED Safety Strobe lights. > Easy to Use : 3 setting modes（Steady, Fast strobe, Slow flash）Merge in a button, conveniently simple to use and user friendly. With it's strong heavy duty back clip it can hook on backpacks, pockets, belt, running gear, armbands. Also You could chain the 4 Velcro Straps into one as an Armband easily. > Durability & Weather resistant : This item was assembled with stainless steel screws for EXTREME DURABILITY and WEATHER RESISTANCE. No matter what brings you out at night or during inclement weather, STUMRE LED Safety Lights can help to keep you or your dog safe. When you're running, walking, jogging, strolling, cycling, changing a tire, or just getting some fresh air, these will keep you SAFE and VISIBLE. Rain or shine, summer or winter - any weather condition, any time - enjoy enhanced visibility and comfort knowing you'll be safe and secure at any time of the day. 【Package】 - LED Safety Lights X 4pcs - Extra Batteries(CR2032) X 5pcs - Velcro Straps X 4pcs - Mini Screwdrivers X 2pcs Don't hesitate and ADD IT TO YOUR CART !