Features:Simple to Use: LED Glowing bracelet by simply slap wrap it to fit on both adult and children, men or women for the wrist, ankle, and arm.Comfortable to wear: Lightweight and ergonomic design, which youll not feel uncomfortable to wear it when youre.Eco-Friendly Materials: The flash display bracelet is made of high-quality plastic (TPU ABC PC) for perfect visual effects.Supper glow in the dark: this LED Slap band provides 360-degree ultra-high visibility in dark and nighttime activities.Long-time Use: Built-in 160mAh lithium battery, long battery life for durable use. Suitable for Party, Concert, Camping, Outdoor Sports and etc.Specifications:Product Name: LED BT BraceletMaterial: ABS+TPU+PCColor: BlackFont Color: Red/Blue/Green/White/Pink/Four colorBattery performance: 3.7V polymer lithium batteryBattery Capacity: 160mAhLED screen size: 105 * 20MMInput voltage / current: 5V/1ACharging type: USB interface chargingResolution: 5 * 28 pixelsConnection method: BT mobile APPSupported lanquages: English or numbersCharging time: 2-3 hoursUse time: 8-10 hoursItem Size: 75 * 60 * 27MM / 2.95 * 2.36 * 1.06inItem Weight: 43g / 1.52ozPackage Size: 100 * 80 * 33MM / 3.94 * 3.15 * 1.30inPackage Weight: 95.3g / 3.36ozPackage List:1 * Bracelet1 * USB Cable1 * User Manual