- Kids will love listening to their stories and adventures with these Tonies headphones- They connect to the Toniebox 2 using Bluetooth - or they can plug into other devices with USB-C- With up to 40 hours of battery life, they won't need recharging often- They're super comfy to wear thanks to an adjustable headband and cushioned earpads- They're foldable and have a detachable cable, so can be neatly packed away after use- The volume-limited design means they're safe for little ears