Feature: [Hop Product Description] : 1. Can roll, jump, and avoid obstacles. Choose the two modes 2. Food grade silicone coat, non-toxic and environmentally friendly, cats play without disturbing people 3. N kinds of replaceable coat, science fiction, cute, fantasy style free switch Specification: [Product size] : Diameter 48mm [Product material] : Environmental protection PC+ silicone [Net weight of product] : 40g [Packing Description] : color box packing Color box size : 65mm*65mm*65mm [Single gross weight] : 47g [Electric pool] : built-in rechargeable lithium battery power supply [Charging instructions] : The charging indicator light is red when the USB cable is plugged in and the green light is steady on when the charging is completed. [Rated input] : DC 5V 1A [Interface] : Type-C [Nominal capacity] : 150mAh Packing List: cat toy ball*1