Features 1、ADJUSTABLE DESIGN: Running LED armbands are adjustable in size and stretchy for long hours of exercise without discomfort and can be worn on the wrist, ankle and arm. 2、5 COLOR LIGHT: LED light up band features a unique 5 color light design that reflects light, making it highly visible and safer for twilight and nighttime activities. 3、3 LIGHTING MODES: LED armband has three lighting modes, fast blinking, slow blinking and constant light mode, with one touch control to choose any preferred mode. 4、WATERPROOF DESIGN: Rechargeable LED armband is designed to be waterproof and wrapped in PVC, so it won't get wet from rain or sweat after exercise. 5、USB CHARGING: LED armband uses USB charging, which is relatively fast and powerful, and can last up to 10 hours of continuous use. 6、APPLICABLE SCENES: Night safety light up band is the perfect accessory for outdoor night sports such as cycling, jogging, running gear, camping and hiking. Specifications: Item Type: LED Armband Material: PVC, Elastic Woven Belt Use: Outdoor Sports, Cycling, Pet Walking Light Emitting Arm Band Battery Type, Quantity: 1 x Button Cell CR2032 (240mAh) (Shipped With Built In Battery) Package List 1 x LED Armband 1 x Data Cable