Volume limiting technology for a safe listening experience Compatible with most smartphone devices and tablets Penguala design for the Hatchimal lover Listen to your favourite music on the go with the Hatchimals Kid Safe Headphones. These parent approved headphones come complete with kid safe technology that includes a built-in volume limiter, letting you safely jam out to your favorite song. The adjustable head strap and cushioned ear pieces are hatching up the utmost comfort while you rock out with Penguala.