Feature:1. SAFETY: The strong luminosity makes you more visible in twilight and rainy weather. The best protection in the dark.2. 3 LIGHTING MODES: It has 3 modes, slow flashing, fast flashing and steady light. You can easily set this via the button.3. ADJUSTABLE: Adjustable Band is ideal for adults and children. The hook and loop fasteners hold tight and do not slip down.4. USB RECHARGEABLE: The battery does not need to be replaced, the straps can be easily charged with the included charging cable.5. UNIVERSAL: Suitable for jogging, running, cycling, night walking, mountaineering, dog walking. More security is on the way.Specification:Material: nylon webbing + LED electronicsSize: Expanded length: approx. 36.5CM, retracted length: approx. 28.5CM, width: approx. 2.5CMEmitting Color: Red / Orange / Yellow / Green / Blue / PinkBlinking mode: long light, fast light, slow light (control by switch)Battery: 1 * LIR2032 coin cellCharging Mode: Once charged, it can be used for about 3 hoursBattery Mode: Lighting time: 60-80 hours, normal use 2-3 months; battery can be replaced by yourself.Feature: Splash-proof, washable removable electronics.Suitable for: outdoor sports, night running, large festivals, concerts, corporate events, etc..Package List:4 x Luminous Arm Bands4 x USB Charging CableNote:Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.Due to manual measurement, there is a tolerance in the product size.