The wireless BuddyPhones Play+ feature 3 SafeAudio levels to choose from, allowing you to adjust for the child's age or a noisy environment. The patented StudyMode helps isolate voices from other sounds, producing crisper, clearer vocals for studying or watching lessons. The headphones can be used both wirelessly and wired, meaning no interruptions when the battery runs out. SafeAudio volume limits of 75/85/94 dB, voice enhancement in StudyMode, 20 hours of battery life, and a 20 m wireless range. They work wired or wirelessly. Built-in microphone with answer/play button, BuddyLink for sharing, soft protein and PU leather ear cushions, and adjustable headband size.