Volume limiting technology for a safe listening experience Transformer faceplate designs Parent-approved Compatible with most smartphone devices and tablets Listen to your favorite music on the go with the Transformers 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 provide the utmost comfort while you rock out with Bumblebee and the Transformers gang.