Adopted advanced infrared technology, this crawling crab is super fun for babies to play with - it will crawl away in the opposite direction when it encounters an obstacle. It is a super fun interactive toddler toy to encourage babies to crawl. Note: Do not use this toy on the carpet, in water or in humid environments. USB CHARGING CRAWLING TOYS: Powered by a built-in 3.7V lithium battery, 2 hours of charging time will last up to 60 minutes of non-stop operation. A USB charge cable comes with the package. Please make sure that the toy is turned off during the charging process. STRONG & GREAT QUALITY: This crawling crab is made of high-quality ABS material, with smooth and burr-free quality. It will not hurt your baby's hand. LONG-TIME PLAYING: This moving crab toy is powered by a 3.7V lithium battery, which can run for up to 30 minutes when fully charged, including a USB charging cable. Let children enjoy a good game time