Portable visibility light attaches to bike, backpack and more. Disco-Tech LED module features 4 selectable colors in glow or flash: red, green, blue, white. Color-changing Disc-O mode and memory feature. Adjustable rubber strap fits up to 2.25'' diameter. Easy push-button operation. Durable weather-resistant body. Impact resistant (drop proof up to 1m). Recharges in approximately 2 hours with micro USB cable (not included). Run time: 5 hours. Indicator light turns from red to green when fully charged. Hang packaged.