Hours of included activities include guided adventures, challenges, mindfulness and relaxation activities, plus dance, learning and instrumental music Included 14-page Adventure Passport guides you through audio adventures with detailed illustrations and has a list of songs and activities Connect your own devices wirelessly using Bluetooth® wireless technology or wired with the included audio cable and listen to your favorite music, podcasts and more Over-ear design is comfortable and provides great sound quality at safe volume level Approximate Dimensions: 18 x 19 x 8 cm Battery requirements: Rechargeable lithium-ion battery (included) Suitable for ages 4 years +