Lossless HIFI Sound Quality-you'll love the built-in 40mm speaker unit, which provides rich bass and lifelike audio. Let you or your kids love what they're listening to, at a safe volume.(Batteries need to be purchased) Bluetooth 5.0 & Built-In Microphone- Wireless Bluetooth 5.0 technology, providing you the needs for quality natural sound and strong bass while keeping convenient. 7 Colorful LED Lights & Wire/Wireless mode- Give light to the music with the incredible wireless kids headphones with LEDs! Which pulse to the rhythm of the music. You will love the fun colors and added visuals! Comfortable, Foldable, Durable & Generous Warranty- The adjustable headband with durable materials can adapt to your head shape and fit perfectly. 55H Playtime & Wide Compatibility-Up to 55 hours of operation time when RGB light is off, up to 8 hours when RGB light is on. Compatible with all electronic devices with Blue-tooth, such as Smart cell phones, iPad, laptops, pcs, computers, etc.