Smart Bluetooth Boxing Bluetooth Music Boxing Children's Exercise And Stress Relief Boxing Features: Light flicker, color change: Cultivate your speed by capturing flickering lights and punching them. New trendy , breaking away from traditional modes: adopting new sensing technology, combining and boxing movements to stimulate physical potential and enhance exercise effectiveness. Type-C versatile fast charging, both computer and power bank can be charged: adopting USB charging design, allowing you to get of battery replacement and providing convenient charging . Built in intelligent chip, sensitive sensing without omission: equipped with high-performance chip, feedback of every strike allows you to enjoy exercise. Bluetooth music customization: low tone stereo speakers can be matched with Bluetooth connection, choose the matching music, and punch . Product Description: Product parameters: Battery: 3.7v500mAh The unit of lithium battery capacity is: 3.7V 500mAh Watt per hour: 1.85Wh 2-hour battery life Lithium battery weight: 20 grams Number of battery units: cell Lithium content: 0.15 grams product size: 30 * 30 * 3.5cm Packaging size: 33 * 31 * 6cm Product List: 1 x Boxing Machine 1 x data cable 1 x Instruction manual